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1997 Pontiac Grand Am GT 3.1L Misfire, rich
Posted to GM Driveability on 9/27/2014 26 Replies

Now I have it together and has consistent mis on 4 and 5 mostly 5. LT -16, if I create a vac leak it will go full lean.

Fuel injectors will hold 40 psi when isolated away from system.

Have a known good injector anyway on #5.

MAF was reading low and sluggish...

26 Replies Received (View Replies)

  Related Documents & Media  1997 Pontiac Grand Am GT

 
Message Closed w/FIX

car Vehicle Data

1997 Pontiac Grand Am GT

VIN 1G2NW52M8V
Engine3.1 L / 6 cyl / GAS
Trans4-speed Automatic (Electronic)
DeliveryFuel Injection
EmissionsOBD-II Compliant
SymptomsMisfire, Rich
OccursAlways

Trouble Codes

P0300Multiple Misfire Detected
Message Closed w/FIX

car Vehicle Data

1997 Pontiac Grand Am GT

VIN 1G2NW52M8V
Engine3.1 L / 6 cyl / GAS
Trans4-speed Automatic (Electronic)
DeliveryFuel Injection
EmissionsOBD-II Compliant
SymptomsMisfire, Rich
OccursAlways

Trouble Codes

P0300Multiple Misfire Detected