 help car wont run. since i put in 315cc injectors, and regapped plugs to .030 |
 Feb 10, 2004 - 5:23 PM
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 Enthusiast  Joined Nov 12, '02 From Webster Ma. Currently Offline Reputation: 1 (100%)  |
well im in the process of putting on my turbo. right now everything is stock. like the fuel pump which will be changed later on when the turbo is actullay on. ok so heress the deal. i put in the new 315cc injectos light green tops or whatever the same ohm independency. and i regapped my plugs to .030 all trac spec. the car wont run for more than like 1 secound lol. whats the problem? every thing is stock except the injectors and gap setting. help.
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Feb 10, 2004 - 6:16 PM
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 Enthusiast Joined Feb 10, '03 From Connecticut Currently Offline Reputation: 11 (100%) |
are the injectors clogged?
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Feb 10, 2004 - 6:36 PM
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Enthusiast Joined Jun 2, '03 From Annandale VA Currently Offline Reputation: 0 (0%) |
Talk to 97sccelica, he waited to put on the new fule pump and it ran too lean and Weakend a piston or somthing, so maybe you shouldnt wait
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Feb 10, 2004 - 6:48 PM
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 Enthusiast Joined Nov 4, '02 From Hecho en la Republica Dominicana/Living in NJ Currently Offline Reputation: 0 (0%) |
you have to check which one your missing spark,fule,or air... then go from there...
but since you did change your injectors the problem might be there... and since you don't have the bigger pump to go with them in yet.. you might not be getting enough pressure from them... and also try changing the spark gap back to stock. -------------------- |
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Feb 10, 2004 - 7:05 PM
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Enthusiast Joined Nov 12, '02 From Webster Ma. Currently Offline Reputation: 1 (100%) |
im not running boost yet. so its really rich but should at least still run. i got it to run for a secound or 2 lol. the injector MAY be clogged. how would i unclogg them? -------------------- |
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Feb 10, 2004 - 7:56 PM
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 Enthusiast Joined Aug 29, '02 From Dallas, Tx Currently Offline Reputation: 0 (0%) |
I doubt it will run if you don't do anything else to change the fuel delivery. Sure, at idle it will be in closed loop mode and will constantly be trying to high stoich, but its can only compensate a certain amount. I would be willing to bet that you're way outside that amount. Figure out what size the stock injectors are and figure out what percentage you changed the inj size. Then dial back the SAFC low throttle map by that amount and I'd be willing to bet the car will run. A really crude way to do it would be to just turn the fuel pressure down until it runs, but thats not really a good idea.
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Feb 10, 2004 - 8:02 PM
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Enthusiast Joined Nov 12, '02 From Webster Ma. Currently Offline Reputation: 1 (100%) |
i was told i dont have enuf pressure. and that the fuel is basicly leaking out since the injectores arent pressurized. also i dont have the safc tuned its all stock. i heard the ecu is only sending the amount of fule to pressureize the stock injectors. sooo..... im just talking. anyhting else? -------------------- |
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Feb 11, 2004 - 12:56 AM
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Enthusiast Joined Jan 22, '04 From bellingham, WA Currently Offline Reputation: 0 (0%) |
i would say do a quick check and toss the old injectors back in... see if it runs fine like that... narrow down the problems as much as possible and take it from there
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Feb 11, 2004 - 2:16 PM
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Enthusiast Joined Aug 29, '02 From Dallas, Tx Currently Offline Reputation: 0 (0%) |
If you haven't changed the fuel pressure from stock then thats simply not the case. Injectors don't start 'dripping' until very low fuel pressures, it depends on the injector, but somewhere around 20psi. Your stock fuel pump will provide more than enough flow at idle. At high rpm and boosting you could have problems with flow on the stock pump. I.e. if it doesn't flow enough under these conditions the fuel pressure will drop and cause a lean condition. Just try turning down the SAFC in the low throttle map at 1000rpm. Turn it down to -20% and see if it will start. You're not going to hurt anything by doing this and it could answer many questions about whats going on. |
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Feb 11, 2004 - 2:50 PM
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 Enthusiast Joined Aug 30, '02 From Anaheim, CA Currently Offline Reputation: 0 (0%) |
your probably running really rich like speedtoe said.
lean out the SAFC, the ecu still thinks that the enjectors are at factory size, so it opens them at the same pulse. your injectors are a lot bigger than stock. have you checked the plugs for any signs of being way rich, like being wet? -------------------- 1994 Celica GT4 WRC Edition
@gt4.wrc on Instagram |
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Feb 11, 2004 - 4:22 PM
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Enthusiast Joined Jan 4, '03 From North Carolina Currently Offline Reputation: 0 (0%) |
this same thing happened to me
the engine wasnt recognizing the higher CC of the new injectors....replace your factory MAP sensor with a 2 bar MAP sensor off an mr2 turbo or supra (depending on which ct26 turbo you're using) i used the 3sgte 2 bar map out of mr2 turbo and it fixed my problem....i didnt run the car long on the new injectors but it still ran! you could pick one up off the mr2 boards for dirt cheap.....and it wouldn't hurt to go to advance auto or pep boys and have them air blast the injectors clean (costs about $10) |
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Feb 11, 2004 - 4:59 PM
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Enthusiast Joined Aug 29, '02 From Dallas, Tx Currently Offline Reputation: 0 (0%) |
This will have absolutely NO effect on how the car idles. The stock map sensor will work just like a 2bar map sensor at idle. When you're boosting you'll either need a 2bar map, or check valves on the stock one, but this doesn't matter at idle. Also, the engine will never 'recognize' the injectors, neither will the ECU. It will always assume you have the factory injectors, thats just how it is programmed. That is why you have the SAFC to fine tune the fuel curve and to compensate for different injectors. |
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Feb 11, 2004 - 8:13 PM
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Enthusiast Joined Nov 12, '02 From Webster Ma. Currently Offline Reputation: 1 (100%) |
hey man i did what u said it idles now just fine i just needed to lean it out. well u Possitive i need a 2 bar sensor.. jwalk has his 5sfe done with out one. an i got the safc. s o figured i could just use that. -------------------- |
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Feb 11, 2004 - 8:19 PM
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Enthusiast Joined Jan 4, '03 From North Carolina Currently Offline Reputation: 0 (0%) |
you dont need a 2 bar map for it to run.....it is a good idea since they're cheap enough...i got mine for about $20 off mr2 boards
for a cheap and easy safety backup....that's all i'm sayin |
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Feb 11, 2004 - 8:22 PM
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Enthusiast Joined Nov 12, '02 From Webster Ma. Currently Offline Reputation: 1 (100%) |
i made like 3 posts over there no one will sell. bu if i find one cheap i will def get one. im just glad i got the car running. thx for the input guys. 
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Feb 19, 2004 - 10:19 AM
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 Enthusiast Joined Aug 30, '02 From North Carolina Currently Offline Reputation: 0 (0%) |
You can also use like 3 check valves in your map sensor line instead of a 2 bar!
-------------------- 99 Toyota Tacoma
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Feb 19, 2004 - 11:00 AM
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Enthusiast Joined Nov 12, '02 From Webster Ma. Currently Offline Reputation: 1 (100%) |
i found one also. didnt mention it. i got it for 60 bucks. more than i expected but eh. that should be in soon. -------------------- |
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