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
iATN Members:
Login to view full TechHelp request Auto Repair Pros: Join iATN to read this TechHelp request Vehicle Owners: Find a nearby iATN member to repair your vehicle 11 Replies Received (View Replies)11 Replies Received (Hide Replies)Related Documents & MediaRelated Documents & Media |
Message Closed
Vehicle Data2003 Mercury Grand Marquis LS
|
Message Closed
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 |