× 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
1989 Chevrolet Blazer Silverado 5.7L Poor Idle Quality, Misfire, slight backfire
Posted to GM Driveability on 2/24/2022 16 Replies

We replaced the engine on this vehicle after the old one locked up. The customer requested performance intake and roller rockers. This vehicle sputters and slightly backfires for the first 1-4 min. of idle in the morning but never again when warm. if the v...

16 Replies Received (View Replies)

  Related Documents & Media  1989 Chevrolet Blazer Silverado

 
Message Closed

car Vehicle Data

1989 Chevrolet Blazer Silverado

VIN 1GNEV18K6K
Engine5.7 L / 8 cyl / GAS
Trans4-speed Automatic
DeliveryFuel Injection / TBI
EmissionsCA
SymptomsPoor Idle Quality, Misfire, Slight Backfire
OccursCold
Message Closed

car Vehicle Data

1989 Chevrolet Blazer Silverado

VIN 1GNEV18K6K
Engine5.7 L / 8 cyl / GAS
Trans4-speed Automatic
DeliveryFuel Injection / TBI
EmissionsCA
SymptomsPoor Idle Quality, Misfire, Slight Backfire
OccursCold