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1991 Pontiac Grand Prix LE 3.1L Excessive Emissions, Poor Idle Quality, Surge, Cuts out, MIL Lamp on
Posted to GM Driveability on 2/26/2004 9 Replies

This car has been a problem for months. Sometimes won't idle. Now car is acting up all the [...] idle, up to TPS of .98 volts, car runs lean, o2 at o volts, iac counts to 198. Above TPS of .98 volts, it snaps right out of it, o2 comes back, iac counts down, bl...

9 Replies Received (View Replies)

  Related Documents & Media  1991 Pontiac Grand Prix LE

 
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car Vehicle Data

1991 Pontiac Grand Prix LE

VIN 1G2WH54T2M
Engine3.1 L / 6 cyl / GAS
Trans4-speed Automatic
DeliveryFI / EFI
EmissionsUS FED
SymptomsExcessive Emissions, Poor Idle Quality, Surge, Cuts Out, MIL Lamp On
OccursAlways, Idle, Intermittently

Trouble Codes

31Map Sensor high
44lean fuel
Message Closed w/FIX

car Vehicle Data

1991 Pontiac Grand Prix LE

VIN 1G2WH54T2M
Engine3.1 L / 6 cyl / GAS
Trans4-speed Automatic
DeliveryFI / EFI
EmissionsUS FED
SymptomsExcessive Emissions, Poor Idle Quality, Surge, Cuts Out, MIL Lamp On
OccursAlways, Idle, Intermittently

Trouble Codes

31Map Sensor high
44lean fuel