 
				
	| 1999 Ford Explorer XL 4.0L Misfire, MIL Lamp on car came in first time with a misfire #3 plug was not firing but looked fine so i replaced plug and ran fine. came back 4 months later with same problem same cylinder so i replaced all plugs and wires. did fine for three months same problem raplced plugs again... 
                        
                            FIX posted 8/9/2004
                               
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 | Message Closed w/FIX 
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| VIN | 1FMZU34X6X | 
| Engine | 4.0 L / 6 cyl / GAS | 
| Trans | 4-speed Automatic (Electronic) | 
| Delivery | FI / sefi | 
| Emissions | OBD-II Compliant | 
| Symptoms | Misfire, MIL Lamp On | 
| Occurs | After 2000-6000 Miles | 
Trouble Codes
| P0303 | Cylinder 3 Misfire Detected | 
| P0304 | Cylinder 4 Misfire Detected | 
Message Closed w/FIX
            
             Vehicle Data
 Vehicle Data
                1999 Ford Explorer XL
| VIN | 1FMZU34X6X | 
| Engine | 4.0 L / 6 cyl / GAS | 
| Trans | 4-speed Automatic (Electronic) | 
| Delivery | FI / sefi | 
| Emissions | OBD-II Compliant | 
| Symptoms | Misfire, MIL Lamp On | 
| Occurs | After 2000-6000 Miles | 
Trouble Codes
| P0303 | Cylinder 3 Misfire Detected | 
| P0304 | Cylinder 4 Misfire Detected | 
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