iammarcuse
Petty Officer 2nd Class
- Joined
- Oct 15, 2007
- Messages
- 131
I have a 2004 6.2L MPI Mercruiser serial number OM695430. It runs perfectly except for a slow idle when cold. After cold starting it idles at only 500 RPM and will stall if you put it in gear. When the engine warms up it idles at 600 and runs flawlessly after that. Manual #31 says to check the IAC (Idle Air Control) and ECT (Engine Coolant Temperature sensor) but does not say how and gives no testing parameters. Does anyone know what ohms it should read hot or cold, or where to find how to test these sensors? Any help appreciated. Thanks.