my galant idles high than will go right back down an then up again sounds like its purrin anyone kno whats wrong lmk thanks tobey

 

Welcome to idle surge.

Is this a vr4? If so check the BISS Screw located on the throttle body, it might just need to be adjusted. Im not sure if n/t have them as well.

Other problems might be but are not limited to, the ISC as well as the ECU having leaky caps.

 

no its a gs

 

Well look for what I described and see if that helps any...

 

ok will do thanks ill let you kno if it helps

 

anyone know about that problem on a 93 talon?? i have the some problem. any solutions?? sorry to ask this on YOUR thread ODB : )

 

lol its all good if you have the same problem no need to say sorry

 

http://www.plymouthlaser.com/biss.htm

Theres some more info about the BISS. Also check for vacuum leaks. There are so many things that can cause Idle Surge, if you do a search on any DSM forum there will be many diagnosis's for it. Good luck in tracking down the problem.

 

vacuum leak, check the gasket for your intake mani. this was my problem in the past

 

Any leak after the MAF will cause that problem. Check all your vacuum hoses, the intake pipe, proper function of the FIAV, intake mani gasket, injector seals. Then go after the electrical- properly set your idle, test the ISC.