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1997 Chevrolet Astro 4.3L Poor Idle Quality, Misfire, Poor Fuel Economy, MIL Lamp on
Posted to GM Driveability on 2/3/2004 10 Replies

Have always had the same code,since vehicle first arrived. Previously, on scan tool data stream, misfire counts would show up for all cylinders, all at a varying rate. Now, data stream indicates misfire on cyl.#3, but will not set po301 code. Checked compressi...

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  Related Documents & Media  1997 Chevrolet Astro

 
Message Closed w/Summary

car Vehicle Data

1997 Chevrolet Astro

VIN 1GNDM19W0V
Engine4.3 L / 6 cyl / GAS
Trans4-speed Automatic (Electronic)
DeliveryFI / cpi
EmissionsOBD-II Compliant
SymptomsPoor Idle Quality, Misfire, Poor Fuel Economy, MIL Lamp On
OccursIntermittently

Trouble Codes

P0300Multiple Misfire Detected
Message Closed w/Summary

car Vehicle Data

1997 Chevrolet Astro

VIN 1GNDM19W0V
Engine4.3 L / 6 cyl / GAS
Trans4-speed Automatic (Electronic)
DeliveryFI / cpi
EmissionsOBD-II Compliant
SymptomsPoor Idle Quality, Misfire, Poor Fuel Economy, MIL Lamp On
OccursIntermittently

Trouble Codes

P0300Multiple Misfire Detected