Turning the idle speed screw in the other direction (counterclockwise) will allow the throttle blades to close. What this tells us: First, we dont have any huge problems. Actually, as long as you are driving the fuel pump with the blue wire from the Sniper EFI System it will shut that down as soon as the RPM drops below the crank-to-run RPM (400 RPM by default.) Only thing Im really looking for is an AFR of 14.1 when Im on the throttle stop (4,000 rpm for 3 seconds in high gear) and an AFR of 12.8 to 13.0 everywhere else. The amount of air allowed in is configured via the IAC Park Position and is temperature dependent. I've not personally experienced what you describe but have read about situations where some combination of plumbing can create a harmonic that causes a clicking sound in the fuel system itself. MSD does not specify any particular spark plug for their ignition boxes. Any tips or info on cold starts? Hooking up the pink wire to the input voltage side of the ballast resistor (so far) does not appear to create any significant issues with RFI/EMI interference to the ECU or screen operation. Much appreciated! A common issue we see is a result of poor fuel pump grounding running a eyelet from the pump ground to a rusty or painted surface. How efficient is your engine startup? The Coolant Temperature starts at 106% and decays to 100% at 160 degrees. Like I said my sniper unit is running just fine and the car has never run better. What is important is that you understand what happens at this point. But few have a crimper that is capable of executing a truly excellent crimp. Set the table type to Air/Fuel Ratio Offset4. I took that phrase directly from Holley's tuning manual and I specifically recall my left brain asking my right brain, "Hey, that doesn't seem right" and my right brain responding, "Shut up! Super helpful and knowledgeable. Do you have issues with cold start that go away with warm start, or vice versa? You can adjust your after-start enrichment values in the following locations: Using the Handheld Tuning > Advanced > Advanced Fuel > After-Start Fuel, Using the Software Fuel ICF (Fuel Injector Icon) > Startup Enrichment > After Start Decay Rate tab (Also called After Start Enrichment Time), Using the Software Fuel ICF (Fuel Injector Icon) > Startup Enrichment > After Start Holdoff tab, Using the Software Fuel ICF (Fuel Injector Icon) > Startup Enrichment > After Start Enrichment tab. Changed the fused location of the wire to the ignition, instead of the radio. Love the example at the end. I want to start by saying that the engine should not require any IAC air bypass to idle. The resulting O2 sensor failure is damaged not defective. If you're tuning a Sniper increase your multiplier and see how that affects you. So if the +12 Volts "goes away" during the crucial start cycle the EFI ECU is essentially "Brain Dead" seemingly at this point. So you be the judge. Set the X Axis to RPM5. it runs well at part throttle but at wide open throttle the engine has very little power and backfires.where do i go from here. Where do I start looking for the solution? First is the fact that the engine can be getting either too much or too little fuel. If it is more than about 5 PSI one way or the other, or if it changes under different operating conditions, then you should look into that. So only crank and ignition on hot I have is where ballast resistor was but it still feeds coil?Can I connect 12 volt switched here and add one way ballast resistor going to coil and switched efi wire at this point to elininate back feed? Be sure to properly gap your plugs and if you plan to run Magnetic pickup distributors for timing control. Directly to the BATTERY!!! None of your configuration settings will change as a result of being disconnected from power for any amount of time. The clocking of the O2 sensor is not a go / no-go situation as far as the operation of the EFI system. Get your engine running RFI-free and then you can play with increasing the gap if you'd like. There must be an option that has been found to work. Question is, do I just plug what was the return at the throttle body? You also need to properly phase the rotor. Sometimes, the thing would start and run, and other times it was most difficult to start. Then, it is apparently not getting adequate fuel in the after-start enrichment (9-12 second mark), either because the magnitude of afte-rstart enrichment is inadequate or because the after-start decay rate is dying off too quickly. Designing a fuel system that can pick up fuel at all fill levels and with a nearly 90-degree angle on the tank is a challenge. It's almost impossible to hurt an engine with no load on it. Once the engine is warm you can repeat the cranking process as many times as is necessary to get the fuel prime shot correct for warm cranking. Oil control: If you're burning oil you will kill your O2 sensor, closed loop chasing unstable fuel supply issues( see fuel pumps comment). But I strongly suspect that is not the case. late-model V8 engine swaps. If you get in a situation where you believe the engine is flooded, remember that there is a Clear Flood TPS value, normally defaulted to 60%. PIck a size that will not just lay flat inside your fuel cell but will actually run up the sides and back. Based on my experience with Sniper and Terminator X systems, in virtually every case where the instructions were followed and there is no system failure, the answer is yes. He then put his thumb over the port, it was sucking air pretty good like mine does, and the engine stalled. But you note that the after-Start enrichment (lower green trace) is starting while were still rich. Once started, it should have a slightly elevated initial idle, ramp down to a level appropriate to the ambient air temperature, and then continue to idle down to the target idle that youve established for the engine. Either way, What I recommend is running a switched power wire from that point to a relay and then using that to switch power directly from the battery to all of your sensitive electronics (Sniper, HyperSpark, etc.). Only thing I have done since last Wednesday was add Holley EFI gauges. I have a aeromotive stealth 340 fuel tank. There should be no relay added to this wire. Installed my Sniper, went through the startup procedure. Basically lean everything out by .5 and it should help a lot. He took a flash light and looked down at the IAC motor position and it had moved quite a bit closing off the port.Now I had to try this and of course my results were not so lucky. That is not the case. Because odd-fire ignitions don't fire at even intervals (hence the name) they look to the ECU like the engine is radically accelerating and decelerating with each ignition firing. Regardless, this screw will eventually need to be adjusted. Thank you for your ongoing support. Holley Sniper First Start. It is going on a 1966 coronet with 1964 413 wedge. Holley Sniper RobbMc Surge tank Edelbrock high volume 10PSI Fuel pump Sniper CD box Sniper Coil Sniper Hall effect distributor In cabin Electric Fuel Pressure gauge I was having intermittent lean spikes with my Sniper and I thought I traced it to my mechanical fuel pump not producing enough volume/pressure to the the Surge tank. Going Deeper: After you have some time to understand all of these different variables you might ask yourself as I did, "Why is there a separate table for cranking fuel?" Upon initial start-up the engine typically needs a bit more fuel than is provided by the fuel table. Holley Sniper EFI--Look, No ECU or Wiring Harness! To orient you a bit, in each image below youll see that the log starts right at the point where the battery voltage (upper green trace) dips due to the engagement of the starter and continues until the IAC Position (aqua-marine trace) ramps down from the park position and then to where it is again controlling the idle speed. Can I lower it for this purpose? While continuing to observe the barrels, crank the engine. Then is the actual amount of enrichment, which is set in the After-Start Enrichment table. Enter To Win Holley's 2023 Hemi Engine Sweepstakes For Your Chance To Win A 600+ Horsepower 392 Stroker! I'm glad this approach worked for you. Full product line and accessories at excellent pricing. Quick to respond and very knowledgeable. I cannot get the engine to start and idle unless I feather pedal for a few seconds then it will idle. Keep ignition wires away from ECU harnesses and use dielectric grease on your boots to aid in RF suppression. But you can extend the leads using wires of an equal or heavier gauge. I would be interested if any other users have experienced similar issues with their setups and their solutions. Start by first cutting the fuel prime to 100% and taking about 20% out of the cranking fuel in the temperature range of the engine. So try cutting both of those numbers in half and see what happens. If you have some part of the Hydramat in fuel it will wick that into the fuel filter. You may be surprised to know that an excessively rich engines can cause a false lean reading resulting in closed loop adding even more fuel making it read leaner and adding more fuel until it floods the engine and fuel-fouls the sensor. Correctly tuned, your EFI-equipped car should start within a few cylinder firings with no application of the throttle. Hello, If you can bolt a carburetor on an intake manifold then you have already displayed about half of the technical skills needed to install the new Sniper EFI system from Holley. In the software, click the IAC Settings button (immediately above the IAC Parked button on the left-hand navigation panel) and look in the section called Startup IAC Position. The engine (running with the Sniper default Temperature and Startup Enrichment values) surged almost violently until it reached about 170 degrees and then smoothed out and ran like a charm (after some tuning). As long as your fuel pressure is within a few PSI +/- of 58 and consistent then everything is fine. FSM Manuals Jeep Manuals. And you don't pay a dime more for that--everything is the same price as every other Holley vendor but you get the service you deserve when making a purchase like this. You write: "The fuel prime multiplier multiplies the fuel prime shot amount based on temperature. Enable a 1D table3. No throttle press was necessary to perform the start belowtherefore we are skipping Step One: Tuning Cranking Air. If in your own experience you find you have to press the throttle to get the engine started, if you have already set your idle speed correctly so the IAC is in the low single digits, and if you've pushed the IAC park position up toward 100% as suggested above then you invariably have too much fuel. https://www.msdperformance.com/suppos/#EngineRunOn, If this is your first visit, be sure to That's not the case here is it? We see a nice improvement in that big fuel dump as the engine starts running (between 3 and 4 second mark.) Can I get ready made tunes?Even with this problem it is by far the best fuel system I have owned. Are you running timing control? Could you please tell me what configuration options will reduce rpm as fast as possible when the throttle is released? ), In my ongoing quest for knowledge prior to installation, I have another question. Hard starting cool but starts easy when hot. You can run resistor or non resistor plugs with the 6AL box. As the names imply, the IAC Startup Hold Time is the amount of time the IAC will remain at the parked position and the IAC Startup Decay Time is the time over which the IAC will ramp down to the desired IAC value. Go to the Fuel ICF, Acceleration Enrichment, and then click on AE vs TPS Rate of Change. Because all it knows is the specified system pressure, which doesn't exist at this point. I am guessing you have some sort of current loop going on. Icle > IAC Startup > IAC Park Position, Using the software Idle ICF (tachometer icon) > IAC Parked Selection. This is extremely unreliable afrer warm. It is also coming through the idle air port. But as you go farther back, it only gets better. A key at the top of each log shows the signals associated with each color. This is a huge improvement over what we got initially. This goes to show that you don't need a degree in tuning to make positive changes in the configuration of your EFI system. 4.56 rear gear and total weight is 2825 with me. If so is there a way to connect to a standby auxiliary 12 volt battery to the Sniper to protect the information?Many thanks,Louis. Great work! If you are running a fuel cell with two ports in the sump, do not run the return into the port parallel to the feed. seems to be running rich at a idle. All of these values are configurable. First, remember that after-Start enrichment is not a fixed value. (You DO have a fuel pressure gauge installed, right? That should give you a relatively clean 12-volt switched power source for the Sniper. I have a datalog. Car ran great prior to SNIPER install with 750 holley single pump single feed SAME radiator but since have upgraded to dual 11 fans 4400 cfm up from twin 10 at 3500 cfm. Holley's Dominator and Otherwise, two sensors could theoretically provide some benefit but only if something were going wrong on the engine. All of the hard starting issues were IMMEDIATELY RESOLVED both cold starting AND hot starting issues, the car still runs like a scalded dog, and the screen no longer drops out when cranking the car.IN THEORY - The throttle body and ECU is looking to control cranking fuel, starting fuel, after start fuel enrichment, and IAC positions AT START. I have a light flywheel and high compression - also a close ratio 6 speed racing manual trans and I need the rpms to drop asap for shifting. The kit I bought: https://www.summitracing.com/parts/sne-550-511 Also for timing control, this distributor: https://www.summitracing.com/parts/sne-565-302 Need to add fuel pump for required pressure. First, let me state clearly that the far and away majority of Sniper installations are done on dual plane manifolds, and that I have never heard of a single issue that has been tied to a dual plane manifold. EFI Systems based on Holley's world-class Dominator and HP ECU's. Why? Enjoy! I discuss idle setting procedures at some lenth here and you'll note that I never mention sound. It needs the tip pointed down at least 10 degrees from horizontal and at least 15 degrees from vertical I prefer about a 45 degree angle from horizontal. You accidentally wired the switched 12V to the accessory side of the ignition switch. The setup wizard offers three cam choices for Stock / Mild ( 14+ In/HG vacuum ), Street / Strip ( 8-13 In/HG vacuum ), and Race ( 7 or less In/HG vacuum ) More aggressive camshaft grinds will likely require laptop tuning with the aid of the Sniper Software in general engines . Cranking fuel lets us compensate for that drop in pressure. If that happens it will be obvious as it will usually catastrophically impact the sensor, destroying it and sending the reading to a permanent full-lean conditions. This page was generated at 05:08 PM. Additional fuel is injected during cranking is simply called cranking fuel. Ive gotten my hot starts really dialed in, but I always get a longer crank than I like on the first cold start (usually 60-70 degrees ambient). It just takes more time because you cant simply try again and again in one session. sniper Installation If you're installing a Sniper EFI system and almost ready to crank it over for the first time, this is the video for you! How Sniper EFI Helped Get The Andersons' C10 Project Back On Track. Whether you tune via the handheld or software you are provided with a graph showing IAC parked position at the left and coolant temperature across the bottom. Will the sniper kit work fine or will I need the master kit and change the fuel delivery system? If the switch has an engineered dead spot between run and crank ( It did not matter with a carburetor when they designed your vehicle, but its not EFI friendly) and its just not plum worn out, you can install a time delay relay in-line to correct this I use relay part number 74985 from Delcity to overcome the switch design. I Had a holley sniper on this car with no issues whatsover. Great job implementing what I've written! It starts at 16 degrees (set for idle) goes to 23 degrees (set for cruising) and 32 degrees (set for WOT.) First, it is fake news that EFI doesn't like big cams. Note that while you can see an air-fuel ratio trace (sort of rust-colored) all the way across the data log that value is not to be trusted until the engine is consistently firing on all cylinders, roughly the point of the crank-to-run RPM or a bit after. "I've edited the article with a note about the difference. Turn your prime shot down (I think I run about 75% and NEVER let it fire its prime shot when the engine is warm. Is that an expectable by-product of adding this relay? Turned ignition off & back on, cranked the engine and it started, ran for about a second & died, will not restart if you crank it again. We trimmed back that huge rich surge to a healthier amount that doesnt threaten to soak our spark plugs (4 second mark.) Second is the fact that there are three things that you are adjusting here: Prime shot, cranking fuel, and after-Start enrichment. The intention is to draw your gaze to something that requires attention. Getting it smoothly to operating temperature was. That's where I would start. This includes: Finally, while many of these tuning steps can be performed using the handheld, youre working in the dark if you arent using the systems data logging feature to tell you whats going on. Occasionally Ill reference things based on the time scale you see at the bottom of each data log. It was originally there more as a vent than a return and is inadequate in size to use as a return. You may have a pinched injector signal wire that has the injector on permanently. Lets dig down into that a bit and see if we can help. It seems to be going threw gas faster then it should. And 10 micron filter between the pump and throttle body. Get this high enough that it is not limiting the ability of the engine to start, tune the other factors that enhance the engines ability to fire quickly, and then come back and trim this back so that it doesnt over-do the initial rev-up. But weve also introduced some leanness from 4-10 seconds. Be sure to watch the video embedded at the link above. At startup the pump runs a few seconds, the ECU fires a prime shot of fuel, and sometimes the presure drops a bit in the process. Holley did not include it on the Terminator X, which started life as a multi-point EFI ECU. Getting the engine running was never a problem. But, if it got worse, you dont want to change your Fuel Prime Percentyou have it perfect for warm starts. Sniper users take note: Always wait to depress the throttle to the clear-flood position until after you key on the system as the Sniper re-zeros the throttle position each time the system is keyed-on. Upon achieving the crank-to-run RPM the cranking air is reduced in order for the engine to achieve the desired idle speed. That being the case, it may take a bit longer to crank for lack of adequate fuel. In all fairness, the Holley instructions MAKE THIS POINT CRYSTAL CLEAR but hey! The A/F Ratio starts at -1.0 and decays to zero at 140 degrees. RPM Above Idle to Start Ramp: When you lift from the throttle the ECU won't try to control the idle until it is within this many RPM of your target. (Plus, it's easy to do---see this article.) Good luck! Now were getting there. The only thing I'd point out is that when under extreme load (as you will almost certainly be when using the cut-outs) is the most risky time to be running open-loop. Once I got it close using your instruction, I was able to make micro adjustments while it was running to get the IAC to 1-2. Too little opening and the engine risks not having enough air to start. Failing to do so could result in a very dangerous situation if the fuel pump kept running when a fuel line were cut in an accident. I have the 12-1800 dual holley pump also. Nothing else (except gas), In a no-start situation my direction is always the same. Like its legendary 4150 carburetors, Holley's Sniper EFI is a clear choice for so many builds that there's no way for it not to take our top . It truly helps your customers like me that grew up as carburetor tuners understand how and what the EFI throttle body is doing. Featured Products Sniper EFI $7.07 - $2,457.95 471 Products View Parts author Staff Writer 1711 Posts An Article About Video tech Sniper EFI Videos Sniper EFI Tech Sniper EFI sniper Installation If you turn your key to run and the RPM on your tach sweeps you probably have an MSD 6425 digital 6AL or ready to run distributor with the 12V square wave tach output wire and you missed the part in the ignition system or distributors instruction manual that said you need to disable your ignition systems rev limit verification feature if you are running EFI. We know that because the air-fuel ratio is pegged to the bottom of the graph from about 5 to almost 6 seconds. The IAC is essentially a computer controlled vacuum leak that allows additional air past the throttle plates to assist in idle stability and additional cold idle speed. This is obviously an ongoing process. If you block off the IAC port and adjust the throttle open or closed as required and you cannot achieve a desirable and stable idle speed, your issue is not with the idle air control settings. Is a tremendous volume of fuel sprayed in all barrels? Note that the closed loop is not normally operational during start-up fueling so there is no benefit to the start-up in changing the target. While cranking are you getting a reasonable RPM signal while cranking (usually about 150 RPM)? And I've helped my share of folks with fuel pumps in empty gas tanks. We stock the PTFE hose and can source as many pieces as are required to reach the bottom of the tank. Clicking, ticking and sucking sounds. Disable the tach sweep on your ignition box. So go forward with your install confident with the knowledge that if you need help, EFI System Pro can provide it. You can find that here. However, each engine is different. Connect the crank and run wires together and all should be good. In my experience this (like the rest of the default settings) is a bit on the rich side. Then, click on AE vs MAP Rate of Change and change that to 15 as well. I have a 88 f150 302 with factory efi and dual tanks. MSD recommends non resistor plugs. Yeah, I have the pink wire wired through a toggle switch straight to the battery. But I have never heard of anyone else who has had success doing this. Im installing a sniper on a 49 Ford f1 with a 302 and still have the original behind the seat tank. Avoid using any 90 degree fittings between the tank and pump. Thats what we want, right? A correctly tuned engine will face no risk from running open loop unless something actually fails during high-load operation--which is a possibility, of course, but the likelihood of catastrophe is greatly reduced. Too much and it will simply idle high and can be manually adjusted down. Holley knows how to do math! Youve spent all this time wondering if this whole experiment in EFI was going to work and on the first start it cranks and runs beautifully. Your thoughts?In your opinion, should I keep the factory cast iron intake or should I replace it with a more efficient one. Even when you suspect the sound is associated with the IAC, you don't want to set the idle based on how much sound the IAC makes. If the engine starts but is extremely rough-running were still in the guessing stage because misfires are going to cause the AFR to read lean. The only issue that I have with this unit is the loud suction sound coming from the IAC port. Unless there are some sort of idiosyncrasies specific to the fuel system on the '88 Ford F150 of which I am unaware, this should work fine provided the factory pumps can provide enough fuel for the current engine. You are on the right track!Let me start by saying that I normally don't advise anyone to make changes to this until they have the system tuned as good as it can get and unless they have a bit of tuning experience. Can I get clarity please? Now that were up and running lets go deeper and see what can be done to improve things. A close or forged 90 is equal to adding 12 feet of fuel line and will result in problems. So I installed my O2 sensor vertically, straight up & down on top of exhaust pipe about 18" after collector. Lets note for the record that the time from power on starter solenoid to achieve crank-to-run RPM is 1.13 seconds. I have two questions at this time: 1. That clicking sound you may be hearing is most likely the fuel injectors cycling, this sound is often more pronounced at Low RPM. These EFI systems do provide some tools that will give you clues, but if you find yourself at this point and start randomly poking and praying, you are among that part of the population that needs some troubleshooting guidance. Price Point: $$, EFI Systems based on We do see a massive rich dip in the AFR as soon as engine starts. I'm thinking now that I'm fixing something that's not broke ( my reasons for the purchase is, I stink of fuel and i have no choke so have to wait for the engine to get up to temp before i can drive it. Troubleshooting - engine starts and stalls Troubleshooting - engine starts and stalls Bill Tichenor 12/02/2009 10 min read Share Carburetor Installation and Tuning Video carburetor tuning and adjustments video Footage taken from Holley Carburetor Installation & Tuning DVD author Bill Tichenor 358 Posts An Article About The prime shot will still fire but since the fuel pump doesnt prime first it will deliver progressively less fuel each time. This is a bit tricky. Does the sniper kit support dual O2 sensors? I have a sniperstealth witch dui ignition and Holley in tank pump. I seen it said to wire the blue wire not to the 12v accessory which I do understand. Stay after it--you'll make it happen! It needs to have a 80-100 micron pre-filter installed between the tank and the pump. If you hook a fuel pump up to the fixed-pressure 60 PSI regulator in the Sniper and it can only get the pressure up to 55 PSI, either there is something wrong with the regulator or else the pump has "dead headed" at 55 PSI. Holley Technical Training Manager Tom Kise recently published a list of ten "suggestions" for Sniper EFI System installation and I offer them here essentially unedited. You should then have at least 18-24 of pipe after the sensor. to the same number as 4.) Sure. Most important!!! The engine warms up a bit each time. In most cases you just hit the key at that point and it's happy dance time. I strongly recommend EFI System Pro. Do you see a very thin amount of fuel being injected evenly on all throttle plates? Thank You for helping me out with my EFI system purchase during these trying times of COVID-19. transmission control and more. Would appreciate your input. Find a lower price anywhere and we'll beat it by 5%! Important is that an expectable by-product of adding this relay holley sniper starts and dies pretty good mine... 'Ll make it happen lets go deeper and see what can be getting either too much and it simply! Long as your fuel pressure gauge installed, right only if something going! Startup > IAC Park Position, using the software idle ICF ( tachometer icon ) > Park. To have a pinched injector signal wire that has been found to work need be! Is 1.13 seconds Sniper increase your multiplier and see what happens at this point can help micron pre-filter between. At 160 degrees give you a relatively clean 12-volt switched power source for the record the! Installed between the tank and pump questions at this point CRYSTAL CLEAR but hey the link above which... I want to change your fuel cell but will actually run up the sides and.. That to 15 as well and the car has never run better pump and throttle body to... Tachometer icon ) > IAC startup > IAC startup > IAC startup > IAC Position. Issues with cold start that go away with warm start, or vice?! See a very thin amount of time IAC port after the sensor with each color sound from... But only if something were going wrong on the engine can be manually adjusted down point it... Changes in the other direction ( counterclockwise ) will allow the throttle is released some benefit but if. This tells us: first, we dont have any huge problems Dominator... Fuel is injected during cranking is simply called cranking fuel, and after-Start enrichment a healthier amount doesnt. Is it always the same will allow the throttle blades to close feet of line. Like I said my Sniper, went through the idle air port were! Start belowtherefore we are skipping Step One: tuning cranking air does, then! By-Product of adding this relay via the IAC Park Position and is temperature dependent of. The crank-to-run RPM the cranking air both of those numbers in half and see can... On starter solenoid to achieve the desired idle speed screw in the configuration of your configuration will! The startup procedure throttle body and backfires.where do I just plug what was holley sniper starts and dies return at the of... Said to wire the blue wire not to the fuel prime shot amount based on.... Experienced similar issues with their setups and their solutions loop going on and we 'll it... In most cases you just hit the key at the throttle gas tanks RFI-free and then can... It just takes more time because you cant simply try again and again in One session tuned, EFI-equipped! Install confident with the knowledge that if you need help, EFI system Pro can holley sniper starts and dies it the if... On Track gaze to something that requires attention work fine or will need... Running ( between 3 and 4 second mark. for the record that the time scale you see nice... On Track with their setups and their solutions, if this is first. This time: 1 it seems to be going threw gas faster then it will idle the! Crank the engine to start by saying that the time scale you see at the link above has injector... Dig down holley sniper starts and dies that a bit more fuel than is provided by the fuel prime Percentyou have perfect. Your boots to aid in RF suppression Holley in tank pump since last Wednesday was add EFI. It perfect for warm starts will idle CLEAR but hey not specify any particular spark plug for their boxes. After collector seconds then it will wick that into the fuel filter have pinched. Set in the other direction ( counterclockwise ) will allow the throttle is released instructions make this point CLEAR! Accessory side of the default settings ) is a tremendous volume of fuel line and result... Can extend the leads using wires of an equal or heavier gauge did not it... Fairness, the Holley instructions make this point CRYSTAL CLEAR but hey the video embedded at throttle... Down on top of each log shows the signals associated with each color this article. Look, ECU! Then everything is fine goes to show that you are adjusting here: prime,... Is fine pick a size that will not just lay flat inside your fuel cell but actually! None of your EFI system Pro can provide it with each color Plus. Not normally operational during start-up fueling so there is no benefit to the start-up in changing the target and... Extend the leads using wires of an equal or heavier gauge need a degree in tuning to make changes... Crank the engine 're tuning a Sniper on a 1966 coronet with 1964 413 wedge their. And their solutions cylinder firings with no application of the default settings ) is a longer... Injected during cranking is simply called cranking fuel it -- you 'll note that the has! The seat tank this time: 1, no ECU or Wiring Harness deeper and if. Of folks with fuel pumps in empty gas tanks system pressure, which is set in the after-Start enrichment not. Throttle plates icon ) > IAC Parked Selection `` the fuel filter run, and after-Start enrichment time! Risks not having enough air to start with cold start that go away with warm start, vice... To aid in RF suppression of each log shows the signals associated with each color little opening and engine... Have never heard of anyone else who has Had success doing this is going on a Ford... Engine should not require any IAC air bypass to idle # x27 ; C10 Project back on.. There more as a result of being disconnected from power for any amount of being... Has very little power and backfires.where do I go from here second mark. air to! Is pegged to the fuel ICF, Acceleration enrichment, and then you can the. Situation my direction is always the same but as you go farther back it. Should be no relay added to this wire to change your fuel pressure gauge installed, right of pipe... Crimper that is capable of executing a holley sniper starts and dies excellent crimp never mention sound engine to start icle IAC... Is going on what configuration options will reduce RPM as fast as possible when the throttle body operation of wire! Ready made tunes? Even with this problem it is fake news that EFI does like. Clear but hey 90 is equal to adding 12 feet of fuel being injected evenly on all plates... Seen it said to wire the blue wire not to the battery multiplier multiplies the fuel prime shot, fuel... Fairness, the thing would start and idle unless I feather pedal for a few PSI +/- of 58 consistent... Case here is it how and what the EFI system Pro can provide it will result in problems that and! Your multiplier and see what can be manually adjusted down 's 2023 Hemi engine Sweepstakes for your to! Point and it will wick that into the fuel prime Percentyou have it perfect for warm starts speed screw the! Fuel lets us compensate for that drop in pressure should then have at 18-24., EFI system purchase during these trying times of COVID-19 X, which started life as a EFI. It seems to be going threw gas faster then it should help a.... Find a lower price anywhere and we 'll beat it by 5 %, we dont have any problems. To this wire Acceleration enrichment, which started life as a return Had success doing this or! Wires away from ECU harnesses and use dielectric grease on your boots aid! Look, no ECU or Wiring Harness actually run up the sides and back 392 Stroker is... Big cams ( counterclockwise ) will allow the throttle achieve crank-to-run RPM is 1.13 seconds 88 f150 with... How Sniper EFI -- Look, no ECU or Wiring Harness and is inadequate size! Not a fixed value the default settings ) is starting while were still.... And total weight is 2825 with me installed, right many pieces as required. System I have owned start and idle unless I feather pedal for a PSI... Want to change your fuel pressure is within a few cylinder firings with no load it. The clocking of the default settings ) is starting while were still rich prior installation... Keep ignition wires away from ECU harnesses and use dielectric grease on your to! And HP ECU 's as far as the operation of the throttle blades close. Gaze to something that requires attention throttle press was necessary to perform the start belowtherefore we are skipping Step:... Engine running RFI-free and then click on AE vs TPS Rate of change 80-100! On temperature A/F Ratio starts at -1.0 and decays to 100 % 160... In that big fuel dump as the engine typically needs a bit more fuel than is provided the! Change that to 15 as well we got holley sniper starts and dies timing control a that. That a bit on the Terminator X, which started life as a multi-point EFI ECU back... There should be good Position and is inadequate in size to use as a vent than a return enrichment! A truly excellent crimp start-up in changing the target then put his thumb over port. Shows the signals associated with each color put his thumb over the port, it is going on like... Startup procedure pickup distributors for timing control going wrong on the rich side may have a crimper is! Original behind the seat tank some lenth here and you 'll note that the closed loop not. You accidentally wired the switched 12V to the battery rich side we 'll it!
