Sounds like you need a new crankshaft sensors . About 27 bucks from napa . Go rent a harmonic balancer puller from oreileys and make sure you have 3 1/4 fine thread bolts about 3 1/2 in she's long and some washers for those .

I believe the harmonic balancer bolt is a 21 or 23 I can't remember

When you go to break that bolt loos use a pair of vise grips on the flywheel so it dos t move
Search around there's a couple how to's on this

Took me 30 minuts to do mine