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1991 Chevrolet Astro 4.3L Misfire, Bucks
Posted to GM Driveability on 2/7/2000

This van has new plugs, wires, cap, and rotor. Did a top end clean. The O2 would hardly switch. Replaced O2. Switches better but still not very fast. It doesn't have good vacuum but it is steady not fluctuating. The map sensor tests good. I think the code ...

  Related Documents & Media  1991 Chevrolet Astro

 
Message Closed w/FIX

car Vehicle Data

1991 Chevrolet Astro

VIN 1GNEL19Z2M
Engine4.3 L / 6 cyl
EmissionsOBDI
SymptomsMisfire, Bucks
OccursOn Decel, Intermittently
Misc.Awd

Trouble Codes

33map
Message Closed w/FIX

car Vehicle Data

1991 Chevrolet Astro

VIN 1GNEL19Z2M
Engine4.3 L / 6 cyl
EmissionsOBDI
SymptomsMisfire, Bucks
OccursOn Decel, Intermittently
Misc.Awd

Trouble Codes

33map