Okay, so I just got my new 93 SC 5 speed home. I'm replacing both headgaskets , but even with the two blown headgaskets the car would hold idle (rough for dang sure) but could only crank being jumped off or pulled off. I put a new battery in it, but it still wont crank on its own. Can someone give me some ideas of what to try to get this thing to start.?