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Coolant Temperature Sensor Cts
F150 COLD START AND IDLING
1987 Ford F-150
December, 5, 2008 AT 10:45 PM
Engine Performance problem
1987 Ford F150 6 cyl Four Wheel Drive Manual 200000 miles
The truck will start with no problem.
It will not idle after being started until the engine temp. Is hot.
If I sit in the truck and pat the accelerator or hold the rpm at 1200 the engine will continue to run.
If I do not pat or hold the accelerator the engine will surge about five times and then stop running.
I have changed the Idle by pass valve, the throttle position sensor, and the coolant temperature sensor.
I have also changed the MAP sensor with no change to the engine operation.
After the engine get hot it will idle and run like new.
Any suggestions to resolve this situation.
Thanks is advance.
FOUND 440 RELATED QUESTIONS
Coolant Temperature Sensor
I Have An Engine Coolant Sensor Trouble
December, 6, 2008 AT 8:06 AM
Have you checked the intake air temperature sensor, that can cause a issue also.
Also you could have a leak on the intake that is causing the vehicle to run rough when cold but when the engine heats up and the metal expands it closes the leak off.
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