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1999 Ford F-250 Super Duty XL 6.8L No Power
Posted to Ford Driveability on 7/8/2004 6 Replies

Have this 99 f250 superduty 6.8l starts and idles ok put a load on it and falls flate on its face. No codes fuel pressure 40 psi. Plugs fouled and running rich. Acts like a pluged exhaust but back pressure is ok. Acts like running lean fuel trim long at 25 plu...

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car Vehicle Data

1999 Ford F-250 Super Duty XL

VIN 1FMYUOP720
Engine6.8 L / 10 cyl / GAS
Trans4-speed Automatic (Electronic)
DeliveryFI
EmissionsOBD-II Compliant
SymptomsNo Power
OccursAlways, Under Load
Message Closed w/FIX

car Vehicle Data

1999 Ford F-250 Super Duty XL

VIN 1FMYUOP720
Engine6.8 L / 10 cyl / GAS
Trans4-speed Automatic (Electronic)
DeliveryFI
EmissionsOBD-II Compliant
SymptomsNo Power
OccursAlways, Under Load