Join Date: Jun 2004
Location: Durham, England
Idling at 1700 rpm - please help
Please take pity on a UK Fairmont owner (maybe the only one). Virtually no-one in England has even heard of a Fairmont - so info is REALLY hard to find. Any help will be much appreciated.
My 1997 Fairmont 4 litre (petrol and LPG) will only idle at about 1700-1800 rpm. From a cold start it goes to about 2400 rpm and, as it warms-up, drops to about 1700.
This is on petrol, switching it to LPG invites backfires in the airbox. I have changed the water temp sensor (in the cylinder head), the inlet temp sensor (in the inlet manifold), the Manifold Actual Pressure (MAP) sensor (black box on bulkhead) and the Idle Control Valve. None have made the slightest difference. My local 'expert' has been unable to read the ECU for faults as his equipment is not compatible with my car.
There seems to be no mechanical problem (have checked throttle-stop, cruise control return, etc).
It does seem to be running a little rich (is this a clue?)
Any suggestions will be most welcome as I cannot tolerate my friends sneering at my pride and joy.