holley sniper starts and dieslow income nonprofits

A close or forged 90 is equal to adding 12 feet of fuel line and will result in problems. Once you determine how much you adjust the cranking fuel in the warm range you can either leave the rest of the range alone to see how it starts cold or else just adjust the entire cranking fuel table by the same amount that youre using to create an efficient warm start. Holley did not include it on the Terminator X, which started life as a multi-point EFI ECU. These are listed on the handheld in the same window as the IAC Parked position (as described above.) Once engine is warmed up been driving for awhile. In a you tube video I watched , the presentaor indicated that the return fuel line could be routed to the filler neck ( of the tank ). Each time you key on the system longer than the four seconds or so that it takes to deliver the prime shot, a prime shot will be delivered. Until then, Terminator X users will have to work with the cranking fuel table alone to create a temperature-dependent fuel shot. I strongly recommend EFI System Pro. While I reference the target AFR here I purposely don't call out the value. Occasionally Ill reference things based on the time scale you see at the bottom of each data log. That's where I would start. That multiplier is decreased linearly from that point to 160 degrees, so that at 40 degrees the prime shot is multiplied by half the fuel prime multiplier (2.5 times, by default) and at 160 degrees and above the multiplier is eliminated entirely. Get a gauge. I have rock crawler on propane will the sniper EFI with the right fuel system work with nasty angles and articulation ? Is a tremendous volume of fuel sprayed in all barrels? Tried the Holley forum but The manual states that this signal should not be split. features . Runs, then dies. superchargeddrt Well-Known Member Joined Aug 24, 2009 Messages 2,420 Reaction score 1,102 So now youre left with tuning the Fuel Prime Multiplier. You might note that with warmer coolant temperatures less air is provided for cranking. You just have to go one direction and see if things improve or not. Hard to answer. Pressure holds steady at approximately 50 psig when engine is off. 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. I have a sniperstealth witch dui ignition and Holley in tank pump. In fact, they may be terrible values when applied to your engine. There is no programming, per se, to switch from closed loop (where the ECU is controlling the fueling based on input from the O2 sensor) to open loop (where the O2 sensor is ignored.) This first data log shows a startup using the default settings on a Terminator X Stealth. The resulting O2 sensor failure is damaged not defective. Thanks. My setup requires too much pedal pressure both starting and running. 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. Air is not just coming into the engine via the throttle blades. No, it did not help. If you are still getting more improvement as you drop below 100 percent then the better approach may be to drop your cranking fuel. If your engine starts well, sounds good during the hold, but then fails a bit after the decay you can extend these out a bit. 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 One thing didn't make sense to me. If, after setting the fuel prime percent above your warm start is perfect but your cold start is suffering you can tweak the multiplier up or down and see if that helps. shut truck off. Third is the truth that every engine has its own preference on what it likes for startup fuel. So I can't tell you what TPS to use. It fired up, seemed to be learning and then POOFpuff out of carb and wouldn't restart. What this tells us: First, we dont have any huge problems. Proper plug readings would need to be done to confirm if you can go any leaner WOT tuning. My situation, although related to start up, is somewhat different. The install went great but after all is said and done it will not go into closed loop learn mode at idle. 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. Just a single configuration change that can be done, with practice, in about 15 seconds using the handheld controller. Ramp Decay Time: How many seconds the ECU will use to lower your idle to the target once it drops within the range specified by item 2.). It's almost impossible to hurt an engine with no load on it. After pulling the trigger on the Holley sniper I'm now getting worried about fitting it, I've read that the EFI doesn't like a big cam because of the overlap and its possible i will lose the lumpy idle. The sniper master kits ship with OEM grade 255 LPH Walbro Pumps. Capability Range: Advanced You see that the AFR trace is ar below the target AFR (pink trace.) Do you get an RPM reading on the handheld while cranking? 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). 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.) Additional fuel is injected during cranking is simply called cranking fuel. I would add a 12v-switched relay to power your Sniper. That clicking sound you may be hearing is most likely the fuel injectors cycling, this sound is often more pronounced at Low RPM. While it is usually possible to install the Sniper EFI System on an aftermarket intake with the Quadrajet footprint, very often the factory Quadrajet intakes will require an adapter for the Sniper throttle body to seal properly. 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. Default values on these are 150% and 5, respectively. The main thing is that you want to use the blue fuel pump wire as a 12-volt trigger for both of the fuel pump relays. Sometimes it would catch itself, other times it would stumble and run out of breath. We can adjust that with the after-Start enrichmentIll bump that up a bit. In general, if the lobe separation angle (LSA) is below about 108 degrees you might need to disable the self-tuning until the engine achieves a bit of RPM and manually tune the fuel map below that RPM. idles good, runs amazing. Bill Tichenor. 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. No timing control. Help for our customers is just a phone call, test message, or email away. Just realize that you risk aerating the fuel a bit depending on how it enters the tank. 1964 Chevy Nova, 383 Stroker, AFR 210 Heads, Ford 9inch w/TrueTrac/3.90 Gears, Powerglide Transmission. Direct to the battery means to the battery. Capability Range: Advanced Goat Rope Garage 76.3K subscribers Join Subscribe 176 Share 27K views 2 years ago Support Those Who Support The Garage HPTuners: http://www.hptuners.com Show. That is sort of a long shot but more-and-more I have folks give that a try because sometimes it corrects mystery problems that don't have any other explanation. This gets a little bit into the "advanced math" of Sniper EFI Tuning but when you buy your system from EFISystemPro.Com you can give me a call and I'll gladly walk you through this. Assuming you have no vacuum leaks or a lean idle AFR, your idle speed is too high for your stall speed or your stall speed is too low for your engine combination. Great article. Read the instructions and Follow them. transmission control and more. Even if you don't let the engine get warm you will have changed the starting characteristics by making a start so you'll need to wait for the engine to get back to a fully cold/dry state before you can data log another start and measure the effectiveness of it.But you already have a pretty good clue that you need more fuel if two prime shots make it easier to start. When you remove a spark plug is it bone dry or dripping wet? Do as I Holley says? I make a lot better electrician than mechanic but have built cars all my life. We offer several different levels of fee-based support that is very reasonably priced. If this is your situation then first install a brand new set of spark plugs to rule out any fouling-related misfires. Capability Range: Advanced And 10 micron filter between the pump and throttle body. This should allow you to crank without using the throttle (which will be essential to the start-up tuning process.). 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 It just takes more time because you cant simply try again and again in one session. This is why most OEM EFI pumps are in the tank. Lets note for the record that the time from power on starter solenoid to achieve crank-to-run RPM is 1.13 seconds. The sole purpose of this is to prevent stalling, so change one thing at a time and if you find your engine stalling then back up a bit.The four key settings:1.) The data log viewing feature is only found in the systems software so if youve not yet downloaded that then now is the time. THAT'S A PROBLEM!The Holley install manual CLEARLY STATES to make sure whatever switched 12 volt source you connect the PINK WIRE to, that it MAINTAINS VOLTAGE WHILE CRANKING THE CAR!! Price Point: $$$. Resistance results in heat and heat results in more resistance. Have you ever watched a post nuclear apocalypse movie? Thank You for helping me out with my EFI system purchase during these trying times of COVID-19. A throttle linkage extender and a progressive linkage kit. Fuel must also be added to start the engine. Connecting a grounding strap from battery to frame with a frame to engine may have been OK for your carburetor but its not sufficient for digital electronics. to the same number as 4.) Any suggestions? Thanks, Steve! I hope to do more articles similar to this so stay tuned! Pin 85: To Ground Start by increasing your TPS and MAP ROC blanking values. Thanks. Pinched or Burnt O2 sensor Wiring: Keep it high, tight, and safe. Good point. Also check your cranking voltage if it starts hard. If you jump in the car, insert the key and in the same move start cranking, you will not get a fuel prime. Don't be that guy. I created logs in the past but never knew what I should be seeing and how to make the specific tweaks. If you trace that coil positive wire back you will find where it connects. Much appreciated! If you . In a nutshell, you do the following:1. If you do not understand a step seek assistance. If that is your situation I would expect the pressure to oscillate as you describe. This is the crank-to-run RPM. Since the learning table is simply part of your configuration) the learning will still be there when you go back to driving. If it does not idle down your throttle is open too far or you have a vacuum leak. Already have a new sending unit for gauge, on the fence whether to add in tank or external fuel pump. Thanks Chris, keep up the good work. Beyond that you can turn your cranking fuel down. Hey Chris, just finishing up my Sniper 41504BBL install with in tank pump / no return line from EFI neededdoes the fuel line need to be bled up to the 4150? Can I get clarity please? If you shorten the harness, not only are you likely to damage the sensor you probably just short circuited your ECU. Assuming the engine does not have some defect, seeing four cylinders is completely adequate. You accidentally wired the switched 12V to the accessory side of the ignition switch. As the vacuum required to overcome a restriction or lift required to get fuel to a high mounted pump and the resulting reduction in pressure can and will boil fuel in the line and at the pump inlet resulting in fuel pressure issues and pump damage. Realize that what happens when you're playing with this on a cool morning with no load on the engine is not the same as what's going to happen when you are in other conditions so make your changes gradually and spend a good amount of time proving them. Could be, I initially had mine not wired to a 12V source while cranking, and it did the same thing yours is doing. 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.

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