My 89 sierra won't start without priming. It set up awhile and I got it running again with a new fuel pump. After that I replaced the clutch and now it won't start without priming. I read the oil pressure switch has something to do with the fuel pump relay, I replaced the one on top but that didn't help. I can't tell if it's spraying fuel but after trying to crank it there's gas on the injectors. Any help would be appreciated. Tia.