ok guys ever since i went turbo ive been having these problems with my idle.

whenever i start the car and the engine is cold, it will rev till 2500rpm then drop to 2000rpm....then it will will go up and down from 2000-2500. As the engine gets warmer, the bumps start to get lower and lower. So like from 1000-1500rpm. Finally when it warms up completly, everything runs A1 no problems whatsoever. Meaning even if i turn the car off as long as the engine is warm it will start and idle perfectly.

lets assume that the IACV is working properly cuz i have checked and cleaned it already.

Also what could be a related problem is sometimes when i start the car, it will rev to about 2500 rpm and just drop down and stall despite any gas u give. This has happened 2 times to me and the car wouldnt start untill i let it sit for awhile.

thx for the help as always HT.

 

doesn't the FITV have something to do with the idle when the car is cold? You might want to try cleaning that and screw the white thing all the way down. Maybe someone else can back me up on this. Sorry thats all I can think of.

 

no im not posting a usual h-t search newb reply but have you also tried posting this question as well in the FI forum? Theyll prolly be able to answer real fast.

 

someone had similar problems and they were told it's from the 450cc injectors... hmm

 

oh ya...because im using dsm 450's....a few of my friends have some and they dont have the same probs......any other comments? thx