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1991 Mercury Grand Marquis LS 5.0L Excessive Emissions, Poor Idle Quality, Surge
Vehicle is idling like it has a vacuum leak(surging and running rough) but is running rich to the point where it is blowing black soot out of the tail pipe and fouling all 8 spark plugs with soot. I have replaced the EGR, MAP,IAC,and computer temp sensor. The ...
FIX posted 8/2/2008
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Message Closed w/FIX
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25 Replies Received
25 Replies Received
Related Documents & Media | VIN | 2MECM75F4M |
| Engine | 5.0 L / 8 cyl / GAS |
| Trans | 4-speed Automatic |
| Delivery | FI / SEFI |
| Symptoms | Excessive Emissions, Poor Idle Quality, Surge |
| Occurs | Always, Idle |
Message Closed w/FIX
Vehicle Data
1991 Mercury Grand Marquis LS
| VIN | 2MECM75F4M |
| Engine | 5.0 L / 8 cyl / GAS |
| Trans | 4-speed Automatic |
| Delivery | FI / SEFI |
| Symptoms | Excessive Emissions, Poor Idle Quality, Surge |
| Occurs | Always, Idle |
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