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1979 Rolls Royce Silver Shadow 6.75L Excessive Emissions, Poor Idle Quality, Poor Fuel Economy
I checked the exhaust gasses to verify the emissions failure. I adjusted the mixture weakening screw in two and ahalf turns. This reduced the cruise c.o. down to under 1%. But if it idled for more than 20 seconds the idle c.o. came back up to 5%. I found 2...
FIX posted 8/10/1999
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Message Closed w/FIX
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| VIN | [No VIN Available] |
| Engine | 6.8 L / 8 cyl |
| Emissions | unsure, has converters |
| Symptoms | Excessive Emissions, Poor Idle Quality, Poor Fuel Economy |
| Occurs | Always, Under Load, Idle |
Message Closed w/FIX
Vehicle Data
1979 Rolls Royce Silver Shadow
| VIN | [No VIN Available] |
| Engine | 6.8 L / 8 cyl |
| Emissions | unsure, has converters |
| Symptoms | Excessive Emissions, Poor Idle Quality, Poor Fuel Economy |
| Occurs | Always, Under Load, Idle |
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