Ok first off I have a 97 LT1, 6 speed...First problem I had was with a missfire in #5 & #6..came to be a bad opti, replaced it with new, not a remaned unit..Then came the code P0336- Crankshaft position out of range..Now the question I have is I never had the P0336 code before the opti switch, and now after replacing out the crank position sensor with a new 1 still have the problem...Please Helpppppp