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2003 Cadillac CTS 3.2L Misfire
Posted to GM Driveability on 2/8/2012 21 Replies

Cylinder 1 misfire most of the time, plug darker than the rest. The valve cover gasket has been leaking and filled #1 hole and swelled plug boot. Suspected voltage jumping. Tested compression 175 PSI, 3 and 5 cylinder same compression and no misfire on those c...

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  Related Documents & Media  2003 Cadillac CTS

 
Message Closed w/FIX

car Vehicle Data

2003 Cadillac CTS

VIN 1G6DM57N93
Engine3.2 L / 6 cyl / GAS
Trans5-speed Automatic (Electronic)
DeliveryFuel Injection / Sequential
EmissionsOBD-II Compliant
SymptomsMisfire

Trouble Codes

P0128Cooling System Malfunction
P0300Multiple Misfire Detected
P0301Cylinder 1 Misfire Detected
P0306Cylinder 6 Misfire Detected
Message Closed w/FIX

car Vehicle Data

2003 Cadillac CTS

VIN 1G6DM57N93
Engine3.2 L / 6 cyl / GAS
Trans5-speed Automatic (Electronic)
DeliveryFuel Injection / Sequential
EmissionsOBD-II Compliant
SymptomsMisfire

Trouble Codes

P0128Cooling System Malfunction
P0300Multiple Misfire Detected
P0301Cylinder 1 Misfire Detected
P0306Cylinder 6 Misfire Detected