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1999 Ford F-150 Lariat 5.4L Poor Idle Quality, Misfire
Posted to Ford Driveability on 9/28/2007 11 Replies

Came in with code P0304 - Cyl #4 Misfire and had a dead miss on #4. Replaced plugs and plug boots, still had miss on #4. Checked injector pulse with noid and had steady pulse. Same with coil driver circuit. Swapped #4 coil and Injector with #1 coil and Injecto...

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car Vehicle Data

1999 Ford F-150 Lariat

VIN 1FTRX08LXX
Engine5.4 L / 8 cyl / GAS
Trans4-speed Automatic (Electronic)
DeliveryFI / Port Fuel Injection
EmissionsOBD-II Compliant
SymptomsPoor Idle Quality, Misfire
OccursIntermittently
Misc.4X4 Ext Cab
Message Closed

car Vehicle Data

1999 Ford F-150 Lariat

VIN 1FTRX08LXX
Engine5.4 L / 8 cyl / GAS
Trans4-speed Automatic (Electronic)
DeliveryFI / Port Fuel Injection
EmissionsOBD-II Compliant
SymptomsPoor Idle Quality, Misfire
OccursIntermittently
Misc.4X4 Ext Cab