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1990 Ford F-150 Custom 4.9L Poor Idle Quality, Hesitation
Posted to Ford Driveability on 2/7/2007 16 Replies

Truck has a rough idle and will hesitate at about 50 km on acceleration. Fuel trim is at +30. It has a lean misfire on all cylinders. I have scoped MAP,TPS,IAC and primary ign. No problem found. Have done injector clean and scoped injectors. Vacumm gauge has a...

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car Vehicle Data

1990 Ford F-150 Custom

VIN 2FTEF15Y2L
Engine4.9 L / 6 cyl / GAS
Trans3-speed Automatic
DeliveryFI / SEFI
SymptomsPoor Idle Quality, Hesitation
OccursAlways
Message Closed w/FIX

car Vehicle Data

1990 Ford F-150 Custom

VIN 2FTEF15Y2L
Engine4.9 L / 6 cyl / GAS
Trans3-speed Automatic
DeliveryFI / SEFI
SymptomsPoor Idle Quality, Hesitation
OccursAlways