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P0300 After Cam install

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Old 03-06-2010, 06:27 PM
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Default P0300 After Cam install
Well got my cam, oil pump, LS2 chain. pushrods, 5812 springs installed yesterday.

Idles really nice! Love the lope.

But getting random misfire codes. Poor drivability.

Double checked the coil pak harness, the spark plug wires.

Installed new NGK plugs gapped at ..040 .

Any ideas? Im kinda stuck and depressed right now!

Thanks!

EDIT, Scanned with EFI live and it wont tell me which cylinder is misfiring>

Gotta be something simple??
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Old 03-06-2010, 07:02 PM
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EDIT. Found PID in EFI live for each cylinder misfire. Its # 4. going to check out the plug and rocker arm.
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Old 03-06-2010, 07:47 PM
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Get to work Tim.
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Old 03-06-2010, 07:52 PM
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P0300 is very common with a cam swap. You'll need to change the settings for missfires to keep from having codes thrown.
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Old 03-06-2010, 08:00 PM
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May need to do a Crankshaft variation relearn. A Tech 2 scan tool is required for this.
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Old 03-06-2010, 08:01 PM
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Originally Posted by Mrgoodwrench3
May need to do a Crankshaft variation relearn. A Tech 2 scan tool is required for this.
I dont know if EFI live does it but HPTuners does.
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Old 03-07-2010, 02:58 AM
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Originally Posted by Mrgoodwrench3
May need to do a Crankshaft variation relearn. A Tech 2 scan tool is required for this.
Good to know, if so i'll have my buddy at the dealer do it with the Tech 2, im not sure if EFI live will do it either.

Thanks guys.
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Old 03-07-2010, 09:39 AM
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Well what did you find with #4 Tim?
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Old 03-07-2010, 11:23 AM
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# 4 intake rocker arm loose. Re torqued all of em, Truck runs like a raped ape!! Love this cam. A stall will only make it better!

Ive never posted a vid before, i'll try to get a sound clip. It lopes so nice.

Thanks to TJ for all the Help!!!!!!!!!!!! Awesome tune!!!!!!!!!! This Guy knows his stuff.

Thanks to 03sierraslt for al the help, the tools i borrowed, and the cam install lessons!!! Good guy for sure!

Also Need to Thank My bud Blaise for all the help and tools also. Another Great Guy!!!!!
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Old 03-07-2010, 01:40 PM
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Very cool, glad you got it figured out and you're happy with it, enjoy!
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