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	 1993 Ford Aerostar Eddie Bauer 4.0L Excessive Emissions, Poor Idle Quality 
		
		with the information that I have gathered, it seems that the vehicle has a vacuum leak. Is there anything I should keep in mind because the heads look like they have been replace. 
                        
                            FIX posted 5/2/2012
                             
                 
                            
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| VIN | 1FMDA41X1P | 
| Engine | 4.0 L / 6 cyl / GAS | 
| Trans | 4-speed Automatic | 
| Delivery | Fuel Injection / SFI | 
| Emissions | OBD1, CA regulations | 
| Symptoms | Excessive Emissions, Poor Idle Quality | 
| Occurs | Always | 
Trouble Codes
| 538 | cylinder balance test failed | 
Message Closed w/FIX
            
            
 Vehicle Data
                1993 Ford Aerostar Eddie Bauer
| VIN | 1FMDA41X1P | 
| Engine | 4.0 L / 6 cyl / GAS | 
| Trans | 4-speed Automatic | 
| Delivery | Fuel Injection / SFI | 
| Emissions | OBD1, CA regulations | 
| Symptoms | Excessive Emissions, Poor Idle Quality | 
| Occurs | Always | 
Trouble Codes
| 538 | cylinder balance test failed | 
                            
10 Replies Received
          10 Replies Received
          
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