fluctuating idle

I recently replaced the TPS on my 2001 Grand Prix. At first it all seemed good, but now I'm having some major idle issues. From a cold engine it idles high and keeps rising. When I put it in park it revved high and wouldn't come down until I turned the key off. When I restarted it idled...

I am currently working on the carburetor and ignition settings for better acceleration and smooth idle. Ignition system: - Pertronix 1183N6 "Ignitor" Ignition Module for Delco, early 8 Cyl with 6v Negative Ground Distributor: Original Delco distributor Everything has been thoroughly cleaned...

I have a 1998 Sunfire GT 2.4l, 138,000 miles. I have been having a fluctuating idle problem, and slight loss of power that until just recently had NO code. i finally threw a p0300 misfire code, and am frustrated as to the problem. i have replaced the TPS, MAP sensor, IAT sensor, and spark...