I have a 95 Max...I'm getting really hard starts in the mornings when it's cold and the tranny starts jumping like the timing is off if the gas is depressed too hard. I replaced the fuel filter and the spark plugs with platinum tips. one mechanic said it could be the cam or crank sensor, another said the fuel injection might need cleaning. The "check engine" light isn't coming on...I don't want a $100 diagnostic. Any thoughts?