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1991 Pontiac Tempest 3.1L Excessive Emissions, High HC
Hi Gang: This car runs fine but fails emissions on high HC's. It has a rough idle but not objectionable. Manifold vacuum drops to 16 inches at idle in drive. The motor is a used one,of unknown mileage/history. It seems that the ECM is acknowledging the...
FIX posted 3/1/1999
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| VIN | 1G7LT53TXM |
| Engine | 3.1 L / 6 cyl |
| Emissions | Federal |
| Symptoms | Excessive Emissions, High Hc |
| Occurs | Always |
| Misc. | Similar to a Corsica |
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Vehicle Data
1991 Pontiac Tempest
| VIN | 1G7LT53TXM |
| Engine | 3.1 L / 6 cyl |
| Emissions | Federal |
| Symptoms | Excessive Emissions, High Hc |
| Occurs | Always |
| Misc. | Similar to a Corsica |
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