× Auto Repair Pros Member Benefits TechHelp Knowledge Base Forums Resources My iATN Marketplace Chat Pricing About Us Join Industry Sponsors Video Members Only Repair Shops Auto Pro Careers Auto Pro Reviews
Join Now
International Automotive Technicians Network
1997 Ford F-150 4.2L Poor Idle Quality, Hesitation, Misfire
Posted to Ford Driveability on 10/6/2009 9 Replies

hesitating and backfiring off idle acceleration, came in with fuel trims LT +17% bank 1 and -15% bank 2 so I swaped injectors bank to bank with no change, I smoke tested intake and found intake runner shafts leaking vaccum at back end, then i installed another...

9 Replies Received (View Replies)

  Related Documents & Media  1997 Ford F-150

 
Message Closed w/FIX

car Vehicle Data

1997 Ford F-150

VIN 1FTDF1721V
Engine4.2 L / 6 cyl / GAS
Trans4-speed Automatic (Electronic)
DeliveryFI
EmissionsOBD-II Compliant
SymptomsPoor Idle Quality, Hesitation, Misfire
OccursUnder Load, on Accel
Misc.4.2 Pushrod V6
Message Closed w/FIX

car Vehicle Data

1997 Ford F-150

VIN 1FTDF1721V
Engine4.2 L / 6 cyl / GAS
Trans4-speed Automatic (Electronic)
DeliveryFI
EmissionsOBD-II Compliant
SymptomsPoor Idle Quality, Hesitation, Misfire
OccursUnder Load, on Accel
Misc.4.2 Pushrod V6