I recently got a 90 super coupe with 55,000 miles with the automatic trans. I replaced the plugs, wires, coil pack, DIS module, fuel filter, and all the belts just because everything was original and old. I also replaced the bad AC compressor. I started and drove the car after I completed the work with no issues. The car was parked over the winter indoors and now will not start. It cranks over but sounds like the timing is off. I did get it to start a few times, it's runs like crap for about 20 seconds, revs up and down on its own and then dies. Fuel is good. From what I see from Google maybe the crank position sensor is bad? I just need some input before I buy one. Maybe something I'm missing.? Thanks.