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1998 GMC Savana 3500 5.7L Misfire
Posted to GM Driveability on 4/7/2011 19 Replies

Hi guys, just replaced both heads, new heads. Have misfire constantly cyl. 3,6 and sometimes on 2, set cam retard to 0" no help, checked dist. lined up on no 1 at tdc plugs and wires okay. Wondering if overtightened valves, tightened till no play then 360 more...

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  Related Documents & Media  1998 GMC Savana 3500

 
Message Closed w/Summary

car Vehicle Data

1998 GMC Savana 3500

VIN 1GDHG31R9W
Engine5.7 L / 8 cyl / GAS
Trans4-speed Automatic (Electronic)
DeliveryFuel Injection / csfi
EmissionsOBD-II Compliant
SymptomsMisfire
OccursAlways

Trouble Codes

P0300Multiple Misfire Detected
Message Closed w/Summary

car Vehicle Data

1998 GMC Savana 3500

VIN 1GDHG31R9W
Engine5.7 L / 8 cyl / GAS
Trans4-speed Automatic (Electronic)
DeliveryFuel Injection / csfi
EmissionsOBD-II Compliant
SymptomsMisfire
OccursAlways

Trouble Codes

P0300Multiple Misfire Detected