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1999 Ford F-150 4.6L Misfire
Posted to Ford Driveability on 5/11/2010 19 Replies

Customer recently purchased this vehicle and was told there was a weak coil. Replaced coil idles fine but will misfire when going uphill, if accelerator is increased misfire goes away. Checked spark plugs for 4 & 7 and found them to be fine and barely used. Ve...

19 Replies Received (View Replies)

  Related Documents & Media  1999 Ford F-150

 
Message Closed w/FIX

car Vehicle Data

1999 Ford F-150

VIN 2FTRF18W7X
Engine4.6 L / 8 cyl / GAS
Trans4-speed Automatic (Electronic)
DeliveryFuel Injection
EmissionsOBD-II Compliant
SymptomsMisfire
OccursGoing Uphill
Misc.Fleetside

Trouble Codes

P0100MAF Sensor Signal Voltage Too High
P0153Air Fuel Sensor (Bank 2 Sensor 1) Slow Response
P0304Cylinder 4 Misfire Detected
P0307Cylinder 7 Misfire Detected
Message Closed w/FIX

car Vehicle Data

1999 Ford F-150

VIN 2FTRF18W7X
Engine4.6 L / 8 cyl / GAS
Trans4-speed Automatic (Electronic)
DeliveryFuel Injection
EmissionsOBD-II Compliant
SymptomsMisfire
OccursGoing Uphill
Misc.Fleetside

Trouble Codes

P0100MAF Sensor Signal Voltage Too High
P0153Air Fuel Sensor (Bank 2 Sensor 1) Slow Response
P0304Cylinder 4 Misfire Detected
P0307Cylinder 7 Misfire Detected