 
				
	| 1997 Ford Aerostar 4.0L Poor Idle Quality, Misfire, MIL Lamp on Vehicle was brought to shop w/check engine lamp on .Scanned for codes found po305 po303 misfire codes present. Checked for spark at plugs,did coil test,checked OK ,all wires were routed correctly. Then suspected vac leak at plenum o rings,R&R upper o rings and... 
                        
                            FIX posted 1/6/2005
                               
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 | Message Closed w/FIX 
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| VIN | 1FMDA41X6V | 
| Engine | 4.0 L / 6 cyl / GAS | 
| Trans | 5-speed Automatic (Electronic) | 
| Delivery | FI / SEFI | 
| Emissions | OBD-II Compliant | 
| Symptoms | Poor Idle Quality, Misfire, MIL Lamp On | 
| Occurs | Hot, Idle | 
Trouble Codes
| P0303 | Cylinder 3 Misfire Detected | 
| P0305 | Cylinder 5 Misfire Detected | 
Message Closed w/FIX
            
             Vehicle Data
 Vehicle Data
                1997 Ford Aerostar
| VIN | 1FMDA41X6V | 
| Engine | 4.0 L / 6 cyl / GAS | 
| Trans | 5-speed Automatic (Electronic) | 
| Delivery | FI / SEFI | 
| Emissions | OBD-II Compliant | 
| Symptoms | Poor Idle Quality, Misfire, MIL Lamp On | 
| Occurs | Hot, Idle | 
Trouble Codes
| P0303 | Cylinder 3 Misfire Detected | 
| P0305 | Cylinder 5 Misfire Detected | 
 6 Replies Received
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