Car was running ok, manual trans had a differential bearing go bad. I replaced the trans, and drove the car. Next day rough start, and 1 day later no start. Cranks, an occasionally pops out the intake. Cranking sound normal, have 170psi at 3 front cylinders. No Codes. Replaced crank sensors(both), cam sensor, and ran additional ground wire. Completely lost at this point. Do timing chains jump on these cars? Am I missing something simple? Please help.