 
				
	| 1991 Buick Skylark 3.3L Poor Idle Quality, Misfire, MIL Lamp on Ok..This car came in with customer saying sometimes it backfired a lot while at idle...Code 42 is current. Electronic Spark Timing.... Now I have had some work with the 3.8 in this area so I am thinking its a similar setup... It must have a bad connection..in ... 
                        
                            FIX posted 8/20/2004
                               
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 | Message Closed w/FIX 
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| VIN | 1G4NV54N3M | 
| Engine | 3.3 L / 6 cyl / GAS | 
| Trans | 3-speed Automatic | 
| Delivery | FI / MPFI | 
| Emissions | OBD1 | 
| Symptoms | Poor Idle Quality, Misfire, MIL Lamp On | 
| Occurs | Idle | 
Trouble Codes
| 42 | EST Circuit Error | 
Message Closed w/FIX
            
             Vehicle Data
 Vehicle Data
                1991 Buick Skylark
| VIN | 1G4NV54N3M | 
| Engine | 3.3 L / 6 cyl / GAS | 
| Trans | 3-speed Automatic | 
| Delivery | FI / MPFI | 
| Emissions | OBD1 | 
| Symptoms | Poor Idle Quality, Misfire, MIL Lamp On | 
| Occurs | Idle | 
Trouble Codes
| 42 | EST Circuit Error | 
 10 Replies Received
10 Replies Received
 10 Replies Received
          10 Replies Received
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