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2003 Mercury Grand Marquis LS 4.6L Poor Idle Quality, Hesitation, Misfire
the car has rough idle and will backfire through intake when engine is cold. hesitates pulling away from stop and has poor acceleration when throttle is pressed down 3/4 to full. normal throttle position acceleration is still poor but isn't as noticeable. scan...
FIX posted 7/3/2010
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11 Replies Received
11 Replies Received
Related Documents & Media | VIN | 2MEFM75W33 |
| Engine | 4.6 L / 8 cyl / GAS |
| Trans | 4-speed Automatic (Electronic) |
| Delivery | Fuel Injection / sefi |
| Emissions | OBD-II Compliant |
| Symptoms | Poor Idle Quality, Hesitation, Misfire |
| Occurs | Always, on Accel, Idle |
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Vehicle Data
2003 Mercury Grand Marquis LS
| VIN | 2MEFM75W33 |
| Engine | 4.6 L / 8 cyl / GAS |
| Trans | 4-speed Automatic (Electronic) |
| Delivery | Fuel Injection / sefi |
| Emissions | OBD-II Compliant |
| Symptoms | Poor Idle Quality, Hesitation, Misfire |
| Occurs | Always, on Accel, Idle |
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