 
				
	| 2003 Ford F-150 XL 4.6L Poor Idle Quality, Misfire, MIL Lamp on Truck misfires intermittently, neither engine temp nor run time seem to affect the condition. Normally occurs worst at around 1800 RPM's (45 MPH). I tried swapping the coilpacks between #8 & #5 condition remained the same. Then swapped the plugs #8 & #5, same ... 
                        
                            FIX posted 5/28/2010
                               
                    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 15 Replies Received (View Replies)15 Replies Received (Hide Replies)
 | Message Closed w/FIX 
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| VIN | 1FTRX18W13 | 
| Engine | 4.6 L / 8 cyl / GAS | 
| Trans | 4-speed Automatic (Electronic) | 
| Delivery | Fuel Injection | 
| Emissions | OBD-II Compliant | 
| Symptoms | Poor Idle Quality, Misfire, MIL Lamp On | 
| Occurs | Intermittently | 
Trouble Codes
| P0308 | Cylinder 8 Misfire Detected | 
Message Closed w/FIX
            
             Vehicle Data
 Vehicle Data
                2003 Ford F-150 XL
| VIN | 1FTRX18W13 | 
| Engine | 4.6 L / 8 cyl / GAS | 
| Trans | 4-speed Automatic (Electronic) | 
| Delivery | Fuel Injection | 
| Emissions | OBD-II Compliant | 
| Symptoms | Poor Idle Quality, Misfire, MIL Lamp On | 
| Occurs | Intermittently | 
Trouble Codes
| P0308 | Cylinder 8 Misfire Detected | 
 15 Replies Received
15 Replies Received
 15 Replies Received
          15 Replies Received
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