[Blazerboy1287]

Now I know that the rough idle problem has been addressed in other threads, and normally I wouldn't post a new thread, but there are some other symptoms alongside this that I have not seen mentioned in other posts.

I have a rough idle, and rarely, like once every one or two months, the SES light comes on. I am very busy, and haven't been able to pull a code with the light on. The idle shakes the car and the tach needle fluctuates slightly.

In addition to the idle, when I am in park and revving the engine, even just up to 1500, and trying to maintain that speed, it will drop about 500 rpm, and then slowly go back up to 1500, and then repeat.

Also, when I am up at say 2500 or 3000 RPM and let go of the throttle, the engine rpm will go down in steps, like 2500, 2200, 1500, 1000, 700, 650. This takes about a second and a half or more.

I haven't been able to take the plenum off to check for washing due to a stripped torx screw that some idiot in a shop messed up, but when I get some money, I plan on checking (just need to buy some tools).


Any help in this area would be appreciated, and thanks in advance to everybody.