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1994 Pontiac Grand Am SE 2.3L Misfire
Posted to GM Driveability on 4/2/2009 16 Replies

No codes shown, vehicle runs on 3 cylinders all the time. Scanning with Modis shows qdm b failure, but does not set a code. O2 shows 340-400 while engine running, exhaust is rich, but shows lean on scanner. HELP!!!

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  Related Documents & Media  1994 Pontiac Grand Am SE

 
Message Closed w/FIX

car Vehicle Data

1994 Pontiac Grand Am SE

VIN 1G2NE1534R
Engine2.3 L / 4 cyl / GAS
Trans4-speed Automatic (Electronic)
DeliveryFI / efi
Emissionsfed
SymptomsMisfire
OccursAlways
Message Closed w/FIX

car Vehicle Data

1994 Pontiac Grand Am SE

VIN 1G2NE1534R
Engine2.3 L / 4 cyl / GAS
Trans4-speed Automatic (Electronic)
DeliveryFI / efi
Emissionsfed
SymptomsMisfire
OccursAlways