idle surge

[T2000]

whats the deal with idle surge, i gots it.
likes to dance around idle, but sometimes its fine.

its a stock GT with longtubes and exhuast.

any ideas

 

[sgarlic]

Replace or clean IAC motor, reset the PCM properly, then come back and let us know if it still does it.

 

[Mike97gt]

does the idle surge when the a/c is on ( a/c is on in the two a/c positions and in the defrost and mix modes)

if it only does it in those modes then a low freeon charge can cause this. what happens is the a/c system short cycles and the pcm can not react fast enough to adjust the idle.

 

[T2000]

Replace or clean IAC motor, reset the PCM properly, then come back and let us know if it still does it.

ughh, what is the iac and the pcm

 

[darkside03gt]

IAC is the idle air controll valve on the front of your T/B and the pcm is your computer

 

[Mike97gt]

ughh, what is the iac and the pcm

did you try and see if it only happens when the a/c compressor is running?? very common for this to happen.

 

[T2000]

did you try and see if it only happens when the a/c compressor is running?? very common for this to happen.

i tryed that
and it did surge when i reached in and turned the defrost on

hopefully thats it.

thanx

 

[00GTpony]

also make sure, ur not misfiring on any cylinders.. My idle was jumpin around as well, then i found out my 2nd cylinder was misfiring, and i fixed it, now the idle doest move.