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1991 GMC C1500 Sierra 5.0L Hesitation
Posted to GM Driveability on 6/14/2006 10 Replies

I have a California Fish and Game vehicle that was brought to our shop to diagnose a failed smog inspection. It failed due to ignition timing being advanced - 15 degrees btdc, spec is TDC.

When timing is set to TDC, the vehicle has a severe hesitation. I have...

10 Replies Received (View Replies)

  Related Documents & Media  1991 GMC C1500 Sierra

 
Message Closed

car Vehicle Data

1991 GMC C1500 Sierra

VIN GTDC14HXMZ
Engine5.0 L / 8 cyl / GAS
Trans4-speed Automatic
DeliveryFI / TBI
EmissionsOBD1
SymptomsHesitation
Message Closed

car Vehicle Data

1991 GMC C1500 Sierra

VIN GTDC14HXMZ
Engine5.0 L / 8 cyl / GAS
Trans4-speed Automatic
DeliveryFI / TBI
EmissionsOBD1
SymptomsHesitation