× 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 Chevrolet Cavalier RS 3.1L Poor Idle Quality
Posted to GM Driveability on 7/22/2012 46 Replies

I have the nice old cavalier here. Has a rough idle, smells like its runing rich. Has no codes in it. Pulled a plug looks pretty black but fairly recent change. Watching pid data, o2 switchs, verified coolant temp sensor is correct. Can't see any fuel trim pid...

46 Replies Received (View Replies)

  Related Documents & Media  1991 Chevrolet Cavalier RS

 
Message Closed w/Summary

car Vehicle Data

1991 Chevrolet Cavalier RS

VIN 1G1JC84T2M
Engine3.1 L / 6 cyl / GAS
Trans3-speed Automatic
DeliveryFuel Injection
SymptomsPoor Idle Quality
OccursAlways
Message Closed w/Summary

car Vehicle Data

1991 Chevrolet Cavalier RS

VIN 1G1JC84T2M
Engine3.1 L / 6 cyl / GAS
Trans3-speed Automatic
DeliveryFuel Injection
SymptomsPoor Idle Quality
OccursAlways