94 Z28 Lt1 Turns over but will not start ?
 

Last week I changed the oil and took it out for a couple of hours around town with no problems, no SES, no missing, it ran like a top. I got busy around the house and it set for two days. Got ready to take a Sunday drive and it would turn over but not start. I have changed every sensor, ICM, coil, Opti, plugs/wires, with GM parts except the MAF. Scanned the PCM ( no codes ), changed the PCM back to the original factory spare one, and still no fire with the timing light. Fuel pump is working too, you can smell a little gas after turning it over at the tail pipes. I had the VATS disabled on the re-programmed PCM, and it does have an aftermarket alarm system installed, but it will not turn over if it's not unlocked, so im guessing thats OK as well. I was going to check all the wires for ground and bad connectors, but I did that when I put the rebuilt engine in a few weeks ago. Any one ever had a simular problem, I sure miss the Z running ??
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where did u get the opti and what kind is it? check your wires. check for power to the coil. should be pink wire.

The opti, ICM, Coil, MAP, is GM. This one has got me by the ....s.

so are u getting power to the coil? need to start backtracking. find were the power stops/starts.

Yes the coil has power, I checked everything i can from the GM shop manual with no luck. Can't believe the Opti is bad but maybe. It had only a tiny bit of oil on it from that oil seal for the waterpump ( which is now fixed correctly ). Oil never got on the Opti shaft, only a little on the bottom when it dripped on the crankshaft and was thrown back up on it. I even tried the stock PCM. Scanned both PCM's and still no codes on either one. This one has got me stumped, starting to have thoughts about getting rid of the Camaro, it's really kicking my a$$.