In my ongoing pursuit of TPI happiness my latest problem is a cold idle of around 1500-1300 in park. When it's cold it requires a foot on the gas to get going but after a few seconds will idle on its own just around 15 grand or so. Sometimes the idle bounces 100rpm or so. When it finally gets up to around 220-200* it will start up fine and idle at 750* in park 500* in drive. At first i looked for vac leaksand replace some cracked hard lines. Then I cleaned the iac and throttle body. Then i replaced the iac. I replaced the CTS and O2 sensor as well. I have reset the IAC and TPS numerous times always with the same results. The motor runs grreat hot, just a real high idle when its cold.

Any more ideas?
I've considered swapping in a newer chip maybe an 88 or somethingwith a similar stock setup.

 

ttt
anyone?