lt1 surging when you come to a stop
09-11-2011, 12:49 AM
#1
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lt1 surging when you come to a stop Ok heres the deal my car is surging real bad when i come to a stop or sometimes when i put it in gear. It doesn't do it all the time..when i slow and stop at a light it will drop from 800 down to 400 then back up then back down and try to jump foward even when i have my foot on the break.. put in nuetral and come to a stop it idles fine..its a a4 could it be my torq converter??I have a hotcam and it is tuned thanks
09-11-2011, 12:19 PM
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Ok well it surged to the point it died started it back up it doesnt do anymore. Drove for 30 min no problems went home shut it off..Let it sit for a bit then took it out again started surging again ????
09-11-2011, 07:48 PM
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my car has had the same issues for 3 years now, really random its been doing it less and less lately though. i never figured out what i could be, i just assumed something with the opti but hasnt affected performance at all.
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09-12-2011, 06:36 AM
#8
Without software the only thing you can do is scan and check for your iac counts to see where they are at, if you don't have anything to scan with try opening the TB ever so slightly or close it and see what it does, drive it a bit for a relearn or snap the throttle a few times...
09-13-2011, 02:54 PM
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sounds like a vacc leak.
from your discription of surging up and down. the IAC will adjust for unmetered air entering the engine. it gets a reading from the 02's. spray around your engine with brake clean. hit the rubber hose's and around the intake. if it changes the way the car idles you found your problem
from your discription of surging up and down. the IAC will adjust for unmetered air entering the engine. it gets a reading from the 02's. spray around your engine with brake clean. hit the rubber hose's and around the intake. if it changes the way the car idles you found your problem
09-13-2011, 10:15 PM
#17
ive had this happen more than once. IAC valve does it, and i had a bad tune that did the same thing. Told the tuner, fixed it real easy, replaced my IAC and also fixed it.
