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1987 Cadillac Seville 4.1L Poor Idle Quality, Poor Fuel Economy
Posted to GM Driveability on 9/10/2002 5 Replies

Hello tech's

Here's one that's been giving me fits. Problem began with the ISC not returning to its base position. ECM would command it to extend, but it would never return. Idle just kept going up and up and up every time it would cycle. R/R'd ISC and it's p...

5 Replies Received (View Replies)

  Related Documents & Media  1987 Cadillac Seville

 
Message Closed w/Summary

car Vehicle Data

1987 Cadillac Seville

VIN 1G6KS5182H
Engine4.1 L / 8 cyl / GAS
Trans4-speed Automatic
DeliveryFI / TBI
EmissionsFederal
SymptomsPoor Idle Quality, Poor Fuel Economy
OccursAlways
Message Closed w/Summary

car Vehicle Data

1987 Cadillac Seville

VIN 1G6KS5182H
Engine4.1 L / 8 cyl / GAS
Trans4-speed Automatic
DeliveryFI / TBI
EmissionsFederal
SymptomsPoor Idle Quality, Poor Fuel Economy
OccursAlways