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1991 Ford F-150 Custom 5.0L Hesitation, Surge, Misfire, Poor Fuel Economy
Posted to Ford Driveability on 5/10/2005 12 Replies

This truck will misfire and hesitate under a load. The ignition system is all new timing is set. When I check for advance under load it is only about 8 -10 degrees under gradual acceleration advance is 25 30 degrees. It seems that something is telling computer...

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Message Closed w/FIX

car Vehicle Data

1991 Ford F-150 Custom

VIN 1FTEF15NXM
Engine5.0 L / 8 cyl / GAS
Trans4-speed Automatic (Electronic)
DeliveryFI
Emissionsfed
SymptomsHesitation, Surge, Misfire, Poor Fuel Economy
OccursUnder Load, Cruise
Message Closed w/FIX

car Vehicle Data

1991 Ford F-150 Custom

VIN 1FTEF15NXM
Engine5.0 L / 8 cyl / GAS
Trans4-speed Automatic (Electronic)
DeliveryFI
Emissionsfed
SymptomsHesitation, Surge, Misfire, Poor Fuel Economy
OccursUnder Load, Cruise