Let's try this, measure the resistance of the IAC:
IDLE CONTROL SYSTEM 1. Check Idle Air Control (IAC) Solenoid Resistance Turn ignition off. Disconnect IAC wiring harness connector. Connect DVOM positive lead to VPWR (White/Red wire) terminal of IAC solenoid wiring harness connector. Connect DVOM negative lead to IAC terminal. If resistance is 6-13 ohms, go to next step. If resistance is not 6-13 ohms, replace IAC valve assembly. 2. Check IAC Solenoid Internal Short To Case Turn ignition off. Measure resistance between each wiring harness connector terminal and IAC housing. If either resistance is less than 10,000 ohms, replace IAC solenoid assembly. If each resistance is 10,000 ohms or more, IAC solenoid is okay. If fault is still present, go to CIRCUIT TEST KE in TESTS W/CODES article for additional testing.
Let me know...and ECT(CTS)
No Stall? It should not stall unless you apply vac at idle, this makes the EGR open, if it does not stall with EGR active, then carbon blockage is your answer, remove EGR and clean out the port under it all the way to the throttle plate, I use a coathangar for this, and TBI cleaner, clea EGR valve too, apply vac to the EGR, does the diaphram move? Could be loosing vac at EGR.
Tuesday, September 29th, 2009 AT 3:01 PM