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1990 Pontiac Grand Prix LE 3.1L Poor Idle Quality, Hesitation, Cuts out, Stall, Misfire
Car runs good except at start up, sometimes cold, more after hot soak (worse symtoms).Runs rough, spark knocks,low idle,acts like not firing on all cylinders then stalls restart low idle can't keep running sometimes.I figured code 33 was set because of low...
FIX posted 10/4/1999
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Related Documents & Media 
| VIN | 1G2WJ54T9L |
| Engine | 3.1 L / 6 cyl / GAS |
| Trans | 3-speed Automatic |
| Delivery | FI / EFI |
| Emissions | OBD1 FED EMISSIONS |
| Symptoms | Poor Idle Quality, Hesitation, Cuts Out, Stall, Misfire |
| Occurs | After a Hot Soak, Intermittently |
| Misc. | 4Dr Sedan |
Trouble Codes
| 33 | map |
Message Closed w/FIX
Vehicle Data
1990 Pontiac Grand Prix LE
| VIN | 1G2WJ54T9L |
| Engine | 3.1 L / 6 cyl / GAS |
| Trans | 3-speed Automatic |
| Delivery | FI / EFI |
| Emissions | OBD1 FED EMISSIONS |
| Symptoms | Poor Idle Quality, Hesitation, Cuts Out, Stall, Misfire |
| Occurs | After a Hot Soak, Intermittently |
| Misc. | 4Dr Sedan |
Trouble Codes
| 33 | map |
Video