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Cars tuned but still shuts off

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Old 07-05-2009, 09:00 PM
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Default Cars tuned but still shuts off

I took my car to where I had it tuned and they cant figure it out. When im driving and about to reach a stop, the car shuts down if i press in the clutch while the RPMs are about 1000. If i press on the clutch after im below 1000 it stays on. Its annoying and almost got me into a few accidents. (Car shuts off so power steering goes off too) Any ideas of what i could be?
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Old 07-05-2009, 09:30 PM
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what are you tuning with again? thats a new problem or it was already there before.. too rich afrs could lead to stalling.. but need more info about the problem
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Old 07-05-2009, 09:32 PM
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my friend ptguy08 has the same problem after pushing the clutch to come out of a gear it stalls sometimes
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Old 07-05-2009, 09:43 PM
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how is the afr on idle.. maybe a smoother fuel map on transition between idle and acceleration will help that.. huge difference in fuel from one cel to another can cause surging that eventually would lead to stalling.. but then there are other stuff that could lead to this
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Old 07-05-2009, 09:51 PM
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we checked and there is no boost leaks but his afr's are in the 14.7-15.6 ace you got a good map for the fic you could send me? to try it out
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Old 07-05-2009, 10:05 PM
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Originally Posted by weezyfbayba
we checked and there is no boost leaks but his afr's are in the 14.7-15.6 ace you got a good map for the fic you could send me? to try it out
wish i could man but i dont have experience with fic.. but it might be bov related, a tune to compensate for that would help or recirc the bov, usually though stalling from bov happens in relation to throttle plate closing and not when clutch pedal is depressed.
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Old 07-05-2009, 10:11 PM
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yea my bov that came with the simple kit is recir but i just bought the hks black edition bov and im ordering a new charge pipe from todd so my bov wont be recir anymore
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Old 07-05-2009, 10:41 PM
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synapse bov would fix that.
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Old 07-05-2009, 11:30 PM
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Check your electric throttle plate and make sure it is not sticking from the boost pressure and if there is an air bypass valve for idle control. WHat happens if you tap the gas as you put the clutch in - will it stall if you blip the throttle? Sounds like the injectors are staying in fuel cutoff as you decelerate.
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Old 07-06-2009, 12:52 AM
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Ok so how do i check all of the above? If the throttle plate is sticking how do i check it and fix it? Great feedback btw. The car does not turn off if i give it gas as im slowing down and have the clutch pressed. My idle is very rough as well. Sometimes it still shuts off at idle, even when i wait for it to get under 1000 rpm. Usually, when i lift my hood it stablizes. Its very odd.
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Old 07-06-2009, 12:55 AM
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yea my friend is haveing the same exactt problem as you are bro im still trying to figure it out if i find out ill let u know and u do the same!
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Old 07-06-2009, 01:01 AM
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At first i though it might be a vacuum leak or maybe my bov wasnt recirulating right but i had it checked and everything is fine!! I am running stage 2 cams though and my head is pnp so i dont know if that might have anything to do with it.
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Old 07-06-2009, 01:04 AM
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oh idk i didint find any boost leaks on his either
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Old 07-06-2009, 01:15 AM
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so your bov is venting to air correct?.....are you running a blow through maf setup or is your maf still on the intake pipe?.....if your maf is not blow thru and you have a atmospheric bov then you will stall
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Old 07-06-2009, 01:16 AM
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Originally Posted by Jan06xB
Check your electric throttle plate and make sure it is not sticking from the boost pressure and if there is an air bypass valve for idle control. WHat happens if you tap the gas as you put the clutch in - will it stall if you blip the throttle? Sounds like the injectors are staying in fuel cutoff as you decelerate.
i was thinking of that too.. but i hope its not those coz the piggybacks dont have control on those..
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Old 07-06-2009, 01:22 AM
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Originally Posted by ToyoCel
Ok so how do i check all of the above? If the throttle plate is sticking how do i check it and fix it? Great feedback btw. The car does not turn off if i give it gas as im slowing down and have the clutch pressed. My idle is very rough as well. Sometimes it still shuts off at idle, even when i wait for it to get under 1000 rpm. Usually, when i lift my hood it stablizes. Its very odd.
It sound like your fuel map on the idle area and on the high vacuum part (deceleration area) is too lean.. this sound like a tuning issue, have your tuner fix it. And you are running a more aggressive cams, your idle is gonna be rough.. i assume your afrs and your idle vacuum pressure constantly jumps, having your idle at the rich side might help with that..
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Old 07-06-2009, 03:27 AM
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Yeah, your right. They do jump at idle sometimes. Im going back to the tune shop tomorrow to get it checked out. What should i tell him to look for?
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Old 07-06-2009, 03:29 AM
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Im running an AEM FIC. Would a standalone help to fix this?
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Old 07-06-2009, 03:30 AM
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Originally Posted by ToyoCel
Yeah, your right. They do jump at idle sometimes. Im going back to the tune shop tomorrow to get it checked out. What should i tell him to look for?
lol to look for why the car is stalling?
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Old 07-06-2009, 03:37 AM
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No. For the rough idle due to cams. I never hear race cars sputtering or idling rough. I want my baby to idle correctly not all irregular.
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