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1999 Pontiac Grand Am SE 3.4L Misfire, MIL Lamp on
Posted to GM Driveability on 8/25/2011 16 Replies

Hope we can get some help. I'm helping a friend at his garage. this gran am is giving us fits. shows mis fire on # 4 cylinder only, will not show a code for#4 just po300. what has been done so far, compression 150, replace spark plug and wire, swapped injector...

16 Replies Received (View Replies)

  Related Documents & Media  1999 Pontiac Grand Am SE

 
Message Closed w/FIX

car Vehicle Data

1999 Pontiac Grand Am SE

VIN 1G2NE52E3X
Engine3.4 L / 6 cyl / GAS
Trans4-speed Automatic (Electronic)
DeliveryFuel Injection / SEFI
EmissionsOBD-II Compliant
SymptomsMisfire, MIL Lamp On
OccursAlways, Under Load, on Accel, Idle

Trouble Codes

P0300Multiple Misfire Detected
Message Closed w/FIX

car Vehicle Data

1999 Pontiac Grand Am SE

VIN 1G2NE52E3X
Engine3.4 L / 6 cyl / GAS
Trans4-speed Automatic (Electronic)
DeliveryFuel Injection / SEFI
EmissionsOBD-II Compliant
SymptomsMisfire, MIL Lamp On
OccursAlways, Under Load, on Accel, Idle

Trouble Codes

P0300Multiple Misfire Detected