i just recently purchases an 89 sc. it had original plug wires but the valve covers and intake manifold and oil pan were painted blue which makes me think the engine was out at one time. My problem started out with a bad bucking problem which was intermitten and it has a rough idle. Then the car die on me. It started backfiring and popping and the starter went. Its a manual by the way. It also seems like when im having trouble with it the tack reads nothing. I changed the plugs and wires, and put a starter in it. but it is still idling funny and acting up. It acts like the car is shuting of while it is still on and the car lugging the motor is making it back fire. HELP