Bad idle at stop

[djreel411]

if the car is in drive and stopped the idle seem to rise and fall 300-400 rpms. when you drive or put the car back in park everything works fine.. not sure what i should be looking at,, just replaced EGR, TEMP Sen. and O2 sensor.. had codes coming up for them,, what else should i be looking at? thats causing this?

Thanks

 

[RatFink]

My car did the "searching" and surging idle since I got it new. A Turbo Tweak chip cleared it up. If you still have the stock chip or most aftermarket chips, that may be the problem.

 

[V6UnderPressure]

Could be a bad or dirty IAC. This will cause idle surging.

 

[PhillyTurboSix]

yup IAC was dirty when this happened to one of my GN's

 

[1970gsx]

Your bad idle and lost boost in the other thread are most likely related. Check for air leaks somewhere in the air path.