alright, ive got a 96 trans am ive done the whole lt4 deal, but i get 2 codes thrown about once a week PO300, PO601. the PO300 is a multiple misfire and the PO300 says internal control module memory check sum error. my question what do you think that code is. I did everything right when i did the lt4. ive had the lt4 for about 8 or 9 months now all of a sudden its doing it. any help would be great!!!

 

hmmm.....I believe that with a misfire i would check ignitions components like wires and plugs. Since it is a once a week thing that is kinda rare i dont know what it would be exactly. Did you put in a new opti in the cam swap? Arcing wires maybe? well i have no clue man....