95' 3.4 DOHC High Idle
I got a 95' Monte Carlo with the 3.4 DOHC, and it runs fine except this weird idle problem that it has. When you start the car it might idle "ok", but most of the time the idle jumps to around 1500 RPM, and sits there for a few minutes, and then returns to about 800 RPM'* for a few minutes. It will then go back to a high idle for a few minutes, and then again return to a normal idle.
The car will do this regardless of whether you are just sitting in park or driving it. Of course when you are driving it the RPM jumps are a little less, but are noticeable. I do have a check engine light, however, since it is a 95' with the transitional OBD system in it I can't readily read the codes.
Anyone have any suggestions to what the cause or remedy may be?
Thanks in advance,