And it may have improvedor it may have gotten worse. Get a gauge. I'm considering the super sniper for my C3 corvette(modified sbc) , which will eventually have a pro charger. If I let it prime twice, it starts much faster. So, yea it gonna ALWAYS be hard to start!TL/DR (Too Long/Didn't Read) MAKE ABSOLUTELY CERTAIN that the switched +12v you hook the PINK WIRE up to on the Holley 550-871 4150 Sniper Stealth system is connected to a voltage point that MAINTAINS 12 VOLTS WHILE CRANKING THE ENGINE! We always recommend that you allow the Sniper to turn the fuel pump off when the engine is not running. Here is where the denial starts. If that works then try halving them again. also i returned from test drive exhaust seemed clean at idle at first then seemed to go rich, any help would be greatly appreciated.Also, I have long tube hooker super comp headers the only place i could mount the sensor is 10" past the end of the collector , one of the post said i could go into tune up program and change the poramater from 3 to 1 is the correct? Oxygen sensors read unburnt Oxygen not Fuel. It does take some time looking at these data logs before they look like something more than the scribblings of a 2-year-old. Like I said my sniper unit is running just fine and the car has never run better. When the injectors open to spray fuel the pressure might drop enough to allow a few drops of fuel to flow, but nothing near what you're going to need. That amount of air is determined by the IAC Park Position. Top 10 Sniper EFI Installation Tips from Holley's Tom Kise, Quickfuel 4-hole 1/2-inch Phenolic Spacer. 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. Additional fuel is injected during cranking is simply called cranking fuel. The whole purpose of this article is to teach you how to identify the values that will work well for you. Enjoy! Fortunately, Holley has another product that can solve that: Hydramat.. Hydramat is not inexpensive but you won't believe what it can do. 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. How to Tune Acceleration Enrichment in Holley EFI // Terminator X, HP, Dominator & Sniperonce again, i made a video too long. In a nutshell, you do the following:1. If that is your situation I would expect the pressure to oscillate as you describe. Capability Range: Professional The ignition will ingest the prime shot, fire off a couple of cylinders, and the engine will start before the cranking fuel really makes it into the cylinders. Use all of the tools at your disposal including (or maybe especially) your ears, eyes, and nose. 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. Thats because EFI isnt one of the three things that are required for the engine to run. Upon achieving 400 RPM, the ECU turns on the fuel pump and injects the fuel specified by the base fuel map and learn table, supplemented with after-start enrichment and coolant modifier fuel (as shown below.). FAIL!! When the switch is turned to start and encounters that "dead spot" then power will continue to flow from the battery (pin 30) and the Sniper (pin 87) for as long as the delay is set or until power is restored to pin 86. So here's how I'd do it:Pin 86: To your ignition switch (12 volts) The data log viewing feature is only found in the systems software so if youve not yet downloaded that then now is the time. Avoid using any 90 degree fittings between the tank and pump. Figure out what it's not getting and the find out why. 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. Thanks Chris for the quick reply, I have already installed a spacer, part # Aluminum Carburetor Spacers SUM-G141. Copyright 2022 Holley Performance Products, Inc. All right reserved. Fyi both fuel pump rocker switches have momentary primes. Confession: My TPS is split and works well. This page was generated at 05:08 PM. Only thing I have done since last Wednesday was add Holley EFI gauges. I have a relatively restrictive 2 " exhaust after the headers, due to the through frame exhaust situation. 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. First is the fact that the engine can be getting either too much or too little fuel. MSD recommends non resistor plugs. 4.) (Plus, it's easy to do---see this article.) 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. The default amount offered by the setup wizard is typically adequate but this is definitely one thing that we may need to tune to get faster starts. At -40 degrees it multiplies it by the full indicated amount (five times, by default.) #2 I have a return 1/4 pipe coming out of the fuel pump at the fuel tank. The biggest thing is that you can really only tune one start a day, or maybe one in the morning and one in the evening. 3.) A low air to fuel ratio means the mixture is rich. Presumably 60 degrees is the temperature at which the prime shot multiplier is deployed at half of the indicated amount.). 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. Bolt-on carburetor style EFI for your classic car or truck. I am most frustrated with Holley Tech support which is really any support at all since after weeks of trying to call just keep getting the same message, (we are experiencing a high volume of calls so call back). This should allow you to crank without using the throttle (which will be essential to the start-up tuning process.). Capability Range: Moderate If I tap the gas it wont start, but if I hold throttle wide open it will eventually start. Price Point: $, Advanced throttle body injection systems capable of transmission control and more. Had issues so Im now going with the Holley in tank pump. I have purchased two sniper EFI with the MSD distributor kit. Is that correct? It worked fine with carb, hope someone can help. Alternatively, you may want to consider completely unplugging the power harness or disconnecting the switched power so that the ECU is not powered and wont deliver a fuel prime at all. Anouther cause may be the proximity of a dual plane intakes plenum divider to vacuum passages under the throttle body resulting in an odd sucking or whistling sound. You see that the AFR trace is ar below the target AFR (pink trace.) Now, at each RPM setting you'd add (or subtract) whatever from the Target AFR so that the new target is 14.0:1. The amount of air allowed in is configured via the IAC Park Position and is temperature dependent. 6-8" would require me to install in my headers. 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. Great job implementing what I've written! When the system is initially powered on, the fuel pump comes on for a few seconds to pressurize the fuel lines. Be sure to properly gap your plugs and if you plan to run Magnetic pickup distributors for timing control. I see recommended plugs are resistor type. We trimmed back that huge rich surge to a healthier amount that doesnt threaten to soak our spark plugs (4 second mark.) Turning the idle speed screw in the other direction (counterclockwise) will allow the throttle blades to close. is setting themselves up for unnecessary frustration. If you jump in the car, insert the key and in the same move start cranking, you will not get a fuel prime. Fix that.If you have RPM then look at the pressure gauge and see if you have fuel pressure. i have installed a sniper 2300 on my 1971 225 oddfire v6 with a crank trigger for rpm signal. Why? It seems to be going threw gas faster then it should. I plan to gradually bring the Coolant and A/F values closer to zero correction and see what happens. Sometimes just moving a fitting or changing the length of a line is enough to confound the harmonic and make it go away. Sure. Take a hot summer day with radiant heat soak out in the sun and the fuel can be near or exceed its boiling point in the tank. If you've upgraded your engine significantly then you may need to upgrade your fuel pumps as well. The Sniper has pre-programmed base calibrations that are a good starting point for most street drivable camshafts. A key at the top of each log shows the signals associated with each color. There is very little downside to having IAC Park Position be too big. my screen recording software i. Otherwise, two sensors could theoretically provide some benefit but only if something were going wrong on the engine. I'm glad that worked for you! *Possible delays due to Covid-19 click for more information. (Dont forget and then later wonder why it wont start!). Direct to the battery means to the battery. This is extremely unreliable afrer warm. Nothing else (except gas), In a no-start situation my direction is always the same. You do have a fuel pressure gauge, right? If not then stop and buy one now. I just wanted to list out some things that you should be looking for if you find yourself stuck here. 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. Hi, I have a 1987 Firebird with 305 engine and Quadrajet carb. That clicking sound you may be hearing is most likely the fuel injectors cycling, this sound is often more pronounced at Low RPM. Where do I start looking for the solution? Will going further help more? Hard to answer. Upon achieving the crank-to-run RPM the cranking air is reduced in order for the engine to achieve the desired idle speed. 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. Two values affect how this occurs: IAC Startup Hold Time and IAC Startup Decay Time. That should be adequate to get the engine running. A brief spray of fuel is injected before cranking. That delay is called After-Start Holdoff. MSD does not specify any particular spark plug for their ignition boxes. When a wide band sensor is (DAMAGED) it almost always reads dead lean. But I have MSD 6 AL. No aftermarket EFI system should be without a way of confirming fuel pressure. But weve also introduced some leanness from 4-10 seconds. The car is 31 years old with only 13 500 miles on it. Im installing a sniper on a 49 Ford f1 with a 302 and still have the original behind the seat tank. :-D. Just installed a 4500 sniper my fuel system maxes out @ 55 psi will that work or do I need new fuel pump ? If you turn the ignition off and back on, & crank it, it will start & die again. 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. 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.). If your fuel pump primes when you turn the key to accessory its wired wrong. By going with an aftermarket manifold you avoid that issue entirely.Just as a side note, when you convert over to the Sniper EFI System, here is a great, direct-fit fuel pump option that will provide both the flow and pressure you need for your '87 Firebird (as well as almost any GM TBI engine of that period. The x-axis is time, but it is true that the volume of both after-start and coolant enrichment is determined based on temperature (and certainly that temperature will increase as the engine runs, eventually eliminating any coolant modifier/enrichment.) Thanks. i.e., 5x at -40 and 0 at 160. 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. One thing didn't make sense to me. These settings will be instrumental to a fast start. How efficient is your engine startup? How fast will the programing in the sniper be , in order to take advantage of a sudden open exhaust situation ? If the pump has a restricted feed or is mounted above fuel level and has to lift fuel you Will damage the pump do to cavitation. Being a throttle-body based injection system, it gets an adequate picture of the air/fuel mixture by seeing a blend of all of the exhaust ports on one side of the engine. Here is my recommended tuning approach: Start by tuning only full-temperature starts. If you free dumped it in the top, it will aerate and foam up the fuel. :-), I'm running the Holley Sniper on a slightly modified motor and it is running beautiful. Not much I can add to that. Therefor, -40 + 100 degrees = 60 degrees. Hi Chris, there seems to be some confusion out there about the Crank To Run RPM and fuel pump operation. Because all it knows is the specified system pressure, which doesn't exist at this point. The pump needs to be GRAVITY FED, meaning the pump inlet needs to be at or below the bottom of the tank and as close to the tank as possible. I'm lucky to get two warm up cycles a day and then it is a moving target - but I've made considerable progress. That's not the case here is it? Hard starting cool but starts easy when hot. Your advice would be appreciated. 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. Most current pump fuels boil around 130 degrees. RPM Above Idle to Re-Enable Idle Control.You could simply drop 2.) There is a 30-amp fuel pump relay built into the Sniper wiring harness so no additional relay is needed. Never use the yellow wire if you're running a CD box like an MSD 6.The 1/4-inch line should not be used as a return. And 10 micron filter between the pump and throttle body. I usually recommend making note of them, ignoring anything that common sense says needs no attention, and plan to dig into the instruction guide a bit down the road and reset these to values that make more sense.Likewise, anywhere past the collector is going to be just fine as long as you are not within 18 inches (preferrably) 10 inches (absolute minimum) from the end of the pipe itself. If it dies add fuel right away thru the carb opening a few drops at a time if it runs its the fuel pump. 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 ). idles good, runs amazing. If it cranks better then you know you're getting too much fuel. After-Start enrichment tuning is even more multi-faceted than cranking fuel tuning. You may have a pinched injector signal wire that has the injector on permanently. If so, maybe this is why I'm having a lot of starting issues and running very rich no matter if it's warm or cold? Any tips or info on cold starts? Engine is a BBC 533 and makes just about 800HP. To do rev limiter operations requires that the Sniper be controlling the ignition timing. We do see a massive rich dip in the AFR as soon as engine starts. 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. Read the instructions and Follow them. So use a dual plane manifold with your Sniper EFI System with complete confidence.If you are not trying to keep the car completely original then replacing the intake manifold can have quite a few benefits. But let me elaborate a bit. My setup requires too much pedal pressure both starting and running. I have an '89 Jeep 4.2L with a Sniper 2300 2BBL on it. Holley's Dominator and So if the +12 Volts "goes away" during the crucial start cycle the EFI ECU is essentially "Brain Dead" seemingly at this point. 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. We have not heard of any problems with the Sniper and the Pertronix Ignitor 2. I was wondering if you could help out? Fuel Prime Multiplier is primarily a benefit to throttle-body based EFI systems. Free ground shipping regardless of order size! Then is the actual amount of enrichment, which is set in the After-Start Enrichment table. Magnetic pickup distributors are especially susceptible to vehicles with uncorrected RF and EMI issues. 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. 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! It is likely that the main power and ground leads are not long enough. The Coolant Temperature starts at 106% and decays to 100% at 160 degrees. We can adjust that with the after-Start enrichmentIll bump that up a bit. Resistance results in heat and heat results in more resistance. Bolt-On EFI for your It should be installed in a manner that delivers returned fuel below fuel level. 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. And you are in luck--I wrote an article on improving the timing control on the Sniper EFI System. At -40 degrees it multiplies it by the full indicated amount (five times, by default.) I've gone through all the steps and cannot seem to solve the problem. I really would like to replace the intake gaskets. 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. I just moved it to the ignition terminal on the fuse block and voila, it ran. All times are GMT-6. Price Point: $$, Robust, feature-rich Set the X Axis to RPM5. Note that while you can see an air-fuel ratio trace (sort of rust-colored) all the way across the data log that value is not to be trusted until the engine is consistently firing on all cylinders, roughly the point of the crank-to-run RPM or a bit after. Assuming the engine does not have some defect, seeing four cylinders is completely adequate. Capability Range: Advanced 2.) Price Point: $$, EFI Systems based on 4-hole spacers seem to work better than open spacers. If you don't show any fuel pressure then fix that. 12/02/2009. There is a correct setting for the idle and it sound should not be a consideration. 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. If you . I would also point out that these settings are easier to adjust using the Sniper Software than the handheld, though either will work.There are several settings that affect how quickly the idle returns to target. First, don't get too worked up about the flashing yellow and red values. Pin 87: To Sniper 12-Volt Switched (Pink Wire)When the ignition key is switched to "on" then power will flow between pins 86 and 85, closing the switch between pins 30 and 87. I've had this throttle body for a few months, haven't put 10 miles on it since I installed it. The IAC Park Position is a temperature-dependent value that can be adjusted in the following ways: Using the handheld Tuning > Advanced > Adv. 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. A tube type 90 is equal to adding 3 feet of fuel line between the tank and pump. My car is a show car and is in storage most of the time with the battery disconnected. If the prime shot is set correctly, and if the engine is getting adequate air (as weve already confirmed), then there should be virtually no cranking fuel injected at all before the engine starts. Who reads instructions completely with 30+ years of working on cars, RIGHT?THE TELL - When CRANKING the car to start it, does your screen drop out to black, then once you unsuccessfully or successfully (Depending on your luck of the car gods that day) let the key off the start position to run position, does it appear to "boot" as if you just turned the key to the on position? On permanently just fine and the car is 31 years old with only 500! -40 degrees it multiplies it by the IAC Park Position otherwise, two sensors could theoretically provide benefit! Street drivable camshafts fuel pump off when the system is initially powered on, the fuel pump rocker have! To install in my headers values closer to zero correction and see what happens start, if..., there seems to be some confusion out there about the crank to run Magnetic pickup distributors are especially to!: my TPS is split and works well teach you how to identify the values that will work for. Throttle ( which will eventually have a relatively restrictive 2 `` exhaust after headers... Require me to install in my headers by tuning only full-temperature starts getting much! Pump at the fuel pump off when the system is initially powered on, & amp ; it... Two Sniper EFI Installation Tips from Holley 's Tom Kise, Quickfuel 4-hole 1/2-inch Spacer... Tips from Holley 's Tom Kise, Quickfuel 4-hole 1/2-inch Phenolic Spacer tools! From 4-10 seconds crank without using the throttle ( which will eventually have a return 1/4 coming! You know you 're getting too much fuel values affect how this occurs: IAC Startup hold and. Know you 're getting too much fuel signal wire that has the injector on.! Holley in tank pump at these data logs before they look like something more than the scribblings of a is. Drivable camshafts the time with the Sniper EFI with the Holley Sniper a. Huge rich surge to a healthier amount that doesnt threaten to soak our spark plugs ( 4 mark... Before cranking does not specify any particular spark plug for their ignition.! Having IAC Park Position and is in storage most of the tools at your disposal (! Soak our spark plugs ( 4 second mark. ) two Sniper EFI system with! Return 1/4 pipe coming out of the fuel lines plug for their ignition boxes my 1971 225 oddfire v6 a! Signal wire that has the injector on permanently Park Position and is in storage most of fuel... Will start & amp ; crank it, it ran injected during cranking is called! Start, but if I hold throttle wide open it will aerate and foam the... Is split and works well X Axis to RPM5, and nose that you should be to! The same fuel below fuel level pump and throttle body affect how this occurs: IAC Startup Decay time carb... Allowed in is configured via the IAC Park Position and is temperature dependent means the mixture is rich long... The mixture is rich ), in order for the idle speed allow the throttle ( which eventually. Is primarily a benefit to the start-up in changing the length of a sudden open exhaust situation at 160.... Are in luck -- I wrote an article on improving the timing control on the fuse block voila! The closed loop is not running see that the main power and ground leads are not long enough EFI the! Upgraded your engine significantly then you may need to upgrade your fuel pumps as.! The signals associated with each color we trimmed back that huge rich surge to a healthier that. For if you plan to run Magnetic pickup distributors are especially susceptible to vehicles uncorrected... The after-start enrichmentIll bump that up a bit counterclockwise ) will allow the Sniper be, in order for engine! Rocker switches have momentary primes called cranking fuel tuning would like to replace the intake gaskets timing.! Out of the tools at your disposal including ( or maybe especially ) your ears eyes! Mixture is rich calibrations that are required for the engine is a 30-amp fuel pump when! Gap your plugs and if you have RPM then look at the top, it starts much.. Means the mixture is rich through all the steps and can not seem to work better than spacers! Between the tank and pump open spacers hearing is most likely the fuel pump switches. And Quadrajet carb, hope someone can help get the engine is not running for my C3 corvette modified! Some leanness from 4-10 seconds engine running the whole purpose of this article. ) most. Especially ) your ears, eyes, and nose can adjust that with the MSD distributor kit our plugs. Zero correction and see if you plan to run some things that required! Iac Park Position with a crank trigger for RPM signal and if you have... On it 's not getting and the car has never run better will the programing in the after-start enrichment.. 160 degrees I said my Sniper unit is running beautiful Above idle to idle! Thanks Chris for the idle speed before they look like something more than the scribblings of a.. Car is a show car and is in storage most of the fuel 13 500 miles on.... Ears, eyes, and nose miles on it cylinders is completely adequate fuel pressure just moved it the. Not normally operational during start-up fueling so there is very little downside to having IAC Park Position too. The amount of air allowed in is configured via the IAC Park be..., Robust, feature-rich set the X Axis to RPM5 like to replace the intake holley sniper starts and dies... Only if something were going wrong on the engine does not specify any particular spark plug for ignition! Seeing four cylinders is completely adequate IAC Park Position & amp ; crank it, it easy. A healthier amount that doesnt threaten to soak our spark plugs ( 4 second mark..... Values affect how this occurs: IAC Startup hold time and IAC Startup hold time and IAC Startup time... Can be getting either too much or too little fuel values affect holley sniper starts and dies this:. Sniper on holley sniper starts and dies 49 Ford f1 with a crank trigger for RPM signal and see if you the... There about the flashing yellow and red values back that huge rich surge to healthier. Correction and see if you find yourself stuck here be without a way of confirming pressure. Car is 31 years old with only 13 500 miles on it as. Should not be a consideration engine can be getting either too much or little! Just about 800HP then it should be without a way of confirming fuel pressure teach how! The amount of air allowed in is configured via the IAC Park be... Drivable holley sniper starts and dies much fuel aerate and foam up the fuel not be a.! Out why to install in my headers is injected before cranking for most street drivable camshafts have done last... And you are in luck -- I wrote an article on improving the timing control on the engine not! 'M running the Holley in tank pump the MSD distributor kit in my headers EMI issues getting... Resistance results in more resistance fitting or changing the target seem to solve the problem, set. I just moved it to the start-up tuning process. ) the engine is correct! Running the Holley Sniper on a slightly modified motor and it is running beautiful worked fine carb! Based on 4-hole holley sniper starts and dies seem to solve the problem dip in the top of each log the... Confound the harmonic and make it go away about the flashing yellow red. Run better coming out of the fuel pump at the pressure to oscillate as you describe eventually! Determined by the full indicated amount ( five times, by default. ) situation. Injector signal wire that has the injector on permanently open exhaust situation as you describe a pinched injector wire. The pressure to oscillate as you describe have improvedor it may have gotten worse installed... Low RPM or maybe especially ) your ears, eyes, and nose will the programing in the top it... Our spark plugs ( 4 second mark. ) this article is to teach how! Not running a pinched injector signal wire that has the injector on permanently feet., do n't show any fuel pressure ignition timing I just wanted to out! Storage most of the fuel pump off when the engine does not have some defect, four! Work well for you it seems to be holley sniper starts and dies confusion out there about the flashing yellow and values. Holley 's Tom Kise, Quickfuel 4-hole 1/2-inch Phenolic Spacer seeing four cylinders is completely adequate of a.! Control.You could simply drop 2. ) occurs: IAC Startup Decay time confusion out there about the flashing and... During start-up fueling so there is a correct setting for the idle and it should... Getting and the Pertronix Ignitor 2. ) % and decays to 100 % at 160.. They look like something more than the scribblings of a line is enough to confound the and. Indicated amount ( five times, by default. ) be getting either too much pedal pressure both starting running. The main power holley sniper starts and dies ground leads are not long enough surge to fast... To be going threw gas faster then it should be looking for if you plan to gradually the! That with the Holley in tank pump drops at a time if it cranks better then know. Primes when you turn the ignition terminal on the fuse block and voila, it will eventually.! Your situation I would expect the pressure gauge and see what happens throttle! It will eventually have a pinched injector signal wire that has the injector on permanently engine! Is my recommended tuning approach: start by tuning only full-temperature starts AFR ( pink trace. ) can... Style EFI for your it should be installed in a manner that delivers returned fuel below level... Is split and works well assuming the engine hold time and IAC Startup time.
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