× 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 Sonoma Syclone 4.3L Spark Knock
Posted to GM Driveability on 1/5/2008 15 Replies

Not sure if I am expecting too much from this truck or not, reading alot of reports about spark knock being normal in these trucks. This truck has heavy spark knock under WOT conditions.

Truck came to me with antifreeze in oil, removed cylinder heads found h...

15 Replies Received (View Replies)

 
Message Closed w/Summary

car Vehicle Data

1991 GMC Sonoma Syclone

VIN 0152461943
Engine4.3 L / 6 cyl / GAS
Trans4-speed Automatic
DeliveryFI / SFI
EmissionsCalifornia
SymptomsSpark Knock
OccursOn Accel
Misc.Syclone 4.3V6 Turbo
Message Closed w/Summary

car Vehicle Data

1991 GMC Sonoma Syclone

VIN 0152461943
Engine4.3 L / 6 cyl / GAS
Trans4-speed Automatic
DeliveryFI / SFI
EmissionsCalifornia
SymptomsSpark Knock
OccursOn Accel
Misc.Syclone 4.3V6 Turbo