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1998 Ford F-150 Lariat 5.4L Hesitation, Misfire, MIL Lamp on
Posted to Ford Driveability on 11/21/2001 16 Replies

hey ford techs,

i don't get this at all,the codes don't make sense to me. how can you get both of these codes? anyway the car has a slight miss at about 40mph. i have pulled a vacuum on the egr valve and the truck starts to run rough so i don't think the egr ...

16 Replies Received (View Replies)

  Related Documents & Media  1998 Ford F-150 Lariat

 
Message Closed w/Summary

car Vehicle Data

1998 Ford F-150 Lariat

VIN 1FTRX07L2W
Engine5.4 L / 8 cyl / GAS
Trans4-speed Automatic (Electronic)
DeliveryFI
EmissionsOBD-II Compliant
SymptomsHesitation, Misfire, MIL Lamp On
OccursHot, Under Load, Cruise, Intermittently

Trouble Codes

P0401EGR System Insufficient Flow Detected
P0402Excessive EGR System Excessive Flow Detected
Message Closed w/Summary

car Vehicle Data

1998 Ford F-150 Lariat

VIN 1FTRX07L2W
Engine5.4 L / 8 cyl / GAS
Trans4-speed Automatic (Electronic)
DeliveryFI
EmissionsOBD-II Compliant
SymptomsHesitation, Misfire, MIL Lamp On
OccursHot, Under Load, Cruise, Intermittently

Trouble Codes

P0401EGR System Insufficient Flow Detected
P0402Excessive EGR System Excessive Flow Detected