Ok here's my problem. I have a 2003 ranger. My Dad changed motors 5 yrs ago. So it's either a 02 or 04 3.0l. I have put a new camshaft synchronizer in it about a month ago. Ran great! Then the other day it took several tries to get it started. But it did start and ran for about a week. Then I went out the other day and it cranks but no start at all. Changed the crankshaft sensor. No change. I've been told that sometimes you have to relearn it. Please help I'm at a loss and can't afford a mechanic