Heres the problem. First car runs great has no problems. Then while driving step on gas not to floor it but to accelerate quickly. The tac jumps from like 3 to 7 3 to 7 up and down up and down while car slowly picks up speed. Then after like 65 mph needle slowly jumps up and down only a few hundred rpm but constantly. Then go home shut off car next morning wont start at all. No jump works nothing. Leave it alone, next day car starts right up. Runs with same problems, does not start next day. Then starts again you see pattern. Replaced dist. cap rotor plugs wires. No change. Are these problems related or not . Or whats wrong in general???