OK here is what else I tried today. Tapped off the TB will not run took off the tap and tapped off the MAF will not run. There is a small plug in my inlet tube for the EGR witch the truck does not have pull the small plug and it will run MAF tapped off put the plug back on and die's right off. So from all I have done today I would say there is no vacuum leak. But the IAC is still trying to correct something. The longer I let it idle the higher it goes. Today I let it run for 5min and it went all the way to 2300rpm. Shut it off and pull the IAC and it will run at 700rpm. OK guys jump in and tell me what I am doing wrong.

 

May have found a fix. Was talking with a friend from Hilborn injection today and he told me that on some on the newer PCM's THAT THE IAC was wired up different than on the 2002 back. He is sending me all the info pin call outs and all so I can give it a look. He said it would do just what mine is doing so we will see. But after the Power Tour.

 

Good luck man, i hope you find the prob, what a pain in the *** huh!

 

we tried a stock pcm with your vin , gm shouldn't have changed that, did you modify your harness in any way?

if you need pinouts, let me know, i have them here.

later,
allen

 

"FIXED IT" "FIXED IT" After all this time and pulling what little hair I have out Hilborn came to the rescue. Bottom to wires the Blue ones on the IAC had to be switched. Happy Happy boy I am. Now on to the Power Tour. Thanks a lot to all and Nelson Tune who sent me lots of PCM's. Thanks a lot Allen for all the help and in put. Me and the old black car are hitting the road first thing tomorrow. THANKS EVERYONE

 

Awesome! Thats what i like to hear.

Now that you will be driving the truck , you can sell me your nova !

 

Never know. First time getting after the truck. It was still smoking tires in third. Man it was fun.

 

This actually makes me feel better, honestly. This was such a pain in the ***, and I didn't even work on it!