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1999 Pontiac Firebird Formula 5.7L Excessive Emissions, Poor Fuel Economy
I got a good one here for all the GM gurus. This bird will not go into closed loop. Whether at idle, cruise or anywhere in between. O2s show rich at idle and 2500 RPM, they hover about 800mv front and back both banks. Coolant temperature reaches 192F max at id...
FIX posted 2/4/2010
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Message Closed w/FIX
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10 Replies Received
10 Replies Received
Related Documents & Media | VIN | 2G2FV22G0X |
| Engine | 5.7 L / 8 cyl / GAS |
| Trans | 6-speed Standard |
| Delivery | FI |
| Emissions | OBD-II Compliant |
| Symptoms | Excessive Emissions, Poor Fuel Economy |
| Occurs | Always |
Trouble Codes
| P1637 | TCM Internal - EEPROM Performance |
Message Closed w/FIX
Vehicle Data
1999 Pontiac Firebird Formula
| VIN | 2G2FV22G0X |
| Engine | 5.7 L / 8 cyl / GAS |
| Trans | 6-speed Standard |
| Delivery | FI |
| Emissions | OBD-II Compliant |
| Symptoms | Excessive Emissions, Poor Fuel Economy |
| Occurs | Always |
Trouble Codes
| P1637 | TCM Internal - EEPROM Performance |
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