× 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
1991 GMC K1500 Sierra 5.7L Idles high in gear
Posted to GM Driveability on 3/10/2010 7 Replies

New GM rebuild engine install. Do not know if problem was there before do to poor running and misfires.

When vehicle first started idles ok. IAC counts are high about 50 counts. Put into gear rpm drop to about [...] and then start climbing to 1000rpm. IAC cou...

7 Replies Received (View Replies)

  Related Documents & Media  1991 GMC K1500 Sierra

 
Message Closed w/FIX

car Vehicle Data

1991 GMC K1500 Sierra

VIN 1GCDK14K4M
Engine5.7 L / 8 cyl / GAS
Trans4-speed Automatic
DeliveryFI / TBI
EmissionsFed, OBD1
SymptomsIdles High in Gear
OccursAlways, Idle
Misc.Tbi
Message Closed w/FIX

car Vehicle Data

1991 GMC K1500 Sierra

VIN 1GCDK14K4M
Engine5.7 L / 8 cyl / GAS
Trans4-speed Automatic
DeliveryFI / TBI
EmissionsFed, OBD1
SymptomsIdles High in Gear
OccursAlways, Idle
Misc.Tbi