rankins66
Member
- Joined
- November 6, 2011
- Messages
- 15
- Reaction score
- 0
- City, State
- Bucyrus, Ohio
- Year, Model & Trim Level
- 2003 Ford Explorer 4X4
I have a 2003 4.6 V8 Explorer and a couple of months ago it started idling to slow and stalling. I bought a Borg Warner Idle Air Control from O Reilly's. After swapping it out it caused the engine to idle way up (around 2,800 rpm) at start up and it would slowly idle down to around 800 rpm. It would also idle up (around 1,200 rpm) when coming to a stop. Then it would drop to 800 rpm. It would even idle around 1,400 rpm while driving thru town causing me to ride the brake. I swapped out the Borg Warner IAC for a Standard Motor Products IAC with no change. I have checked for vacuum leaks. Replaced 1 cracked hose. No change. Throttle plate, Mass Air Sensor, etc. have been thoroughly cleaned. There are no codes coming up. The check engine light is off. I had the battery unhooked for at least 30 minutes when swapping out both IAC's. I also changed the Throttle Position Sensor for a Motorcraft sensor. No change. A local reputable mechanic hooked up his Snap On scanner to it and found nothing out of the ordinary. I have 12.5 volts at the IAC connector on the power side and the white/blue wire going to the PCM connector on the firewall shows almost no resistance. .1 Ohms. Last night I did another resistance check on the white/blue wire. With the key on and the engine off I had .8 Ohms of resistance. When I started the engine it idled up to 2,800 rpm and the resistance went to .380K Ohms. Then when the idle dropped down to normal the resistance went to .256K Ohms. Should I try a Motorcraft IAC from Ford or am I chasing the wrong thing? I'm at a loss. Thanks in advance for your help.