The "TPC" is clearly good because the engine became very hesitant and bogged down when I pressed the throttle, and the check engine light came on. I then cleared that code and the check engine light went off.
I then started over with checking the "IACV" and when I unplugged it, the engine continued running with no changes whatsoever, and no check engine light came on, so I pulled the "IACV" and cleaned it as well as the "IACV" bore, which had a lot of carbon build-up. Upon reinstalling the " IACV" I then started the engine and unplugged the "IACV" again, and let it run for several minutes, and upon killing the engine and restarting it, the check engine light came on; however, again there was clearly no change in the engines operation. I again cleared the computer, re-plugged the "IACV" and started the engine, at which time the check engine light was off and it stayed off. So, I suspected the "IACV" was bad as you suggested, and I ordered one. Upon receipt of the new "IACV" in a few days, and getting it installed, I will let you know how it does. I appreciate your assistance and hopefully this works because I just purchased this truck and got a great deal on it; however, I really can't afford putting much more money into it anytime soon. Thanks again, Shannon.
Tuesday, September 7th, 2010 AT 3:25 AM