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1990 Chevrolet Lumina 3.1L Excessive Emissions, Poor Idle Quality, Stall, Poor Fuel Economy
The vehicle will run rich after warming up (gradually runs richer until it reaches block learn limit. Hovers right there at the limit but needs less fuel for sure. Have tested canister purge, replaced PCV valve (Tested for fuel in crankcase)Replaced MAP sensor...
FIX posted 7/24/1998
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Message Closed w/FIX
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Related Documents & Media 
| VIN | 2G1WL54T3L |
| Engine | 3.1 L / 6 cyl |
| Emissions | OBDI |
| Symptoms | Excessive Emissions, Poor Idle Quality, Stall, Poor Fuel Economy |
| Occurs | On Decel, Idle, Greater the Warmer It Gets |
| Misc. | 4 Door Sedan |
Trouble Codes
| 45 | Rich exhaust indicated verified by scanner O2 reading and Exhaust |
Message Closed w/FIX
Vehicle Data
1990 Chevrolet Lumina
| VIN | 2G1WL54T3L |
| Engine | 3.1 L / 6 cyl |
| Emissions | OBDI |
| Symptoms | Excessive Emissions, Poor Idle Quality, Stall, Poor Fuel Economy |
| Occurs | On Decel, Idle, Greater the Warmer It Gets |
| Misc. | 4 Door Sedan |
Trouble Codes
| 45 | Rich exhaust indicated verified by scanner O2 reading and Exhaust |
Video