Hi All,

 

I have a question about my 88 GL (AT 4x4). It has a rough idle when cold. It used to start right up and idle high for a minute or so like a choke, which seemed normal but now it will intermittently idle really low and rough but only on a cold start. After I drive for a minute or so, it's fine, just the initial cold start is rough.

 

Here's what my homework tells me I could try:

 

Coolant temp sensor - Replace.

Idle stabilizer valve - Clean it. (IAC/ISV...not sure what they are called or even if I have one)

 

Does this sound right? If so...can anyone tell me where these parts are on my vehicle?

 

Oh yeah...I also don't know where the PCV valve is. I tuned up the car but couldn't find that part. Passenger side/back of the block maybe?

 

Any help is always appreciated!

 

Dean

Idle air bypass is on top of the thermostat housing, PCV is screwed into the back of the intake.

A shot of BG carb cleaner, or Seafoam will get clean up either one.

Wicked. Thanks a bunch.