Supercharged L92 missfire help
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Teching In
Joined: Nov 2016
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Supercharged L92 missfire help I have a Supercharged L92 and I keep getting a p0300 code. It runs and idles fine and coils and spark plugs are fine any suggestions on things to check would greatly appreciated.
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Joined: Aug 2010
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From: Ann Arbor, MI
The PCM determines misfires by calculating the acceleration of the crankshaft after each cylinder fire via the crankshaft sensor.
Anything that changes the mass and harmonics of the crankshaft will affect this calculation and can cause misfire codes. This includes a different torque converter and certainly the additional load of a supercharger.
I don't know if a "Crank relearn" might cure your problem, or if you will need to disable the code (as do many people with high stall converters.)
Hopefully one of the pros here will chime in and give you a definitive answer.
Anything that changes the mass and harmonics of the crankshaft will affect this calculation and can cause misfire codes. This includes a different torque converter and certainly the additional load of a supercharger.
I don't know if a "Crank relearn" might cure your problem, or if you will need to disable the code (as do many people with high stall converters.)
Hopefully one of the pros here will chime in and give you a definitive answer.
