I have a 98 ranger 3 liter my check engine light is on again i thought i had some bad fuel but that wasnt it.. i changed the fuel filter.changed plugs and wires. and it still runs rough .. it hesitates.. please help..any sugestion.

 

I am sure you thought of this, but you need to scan the computer for codes to see what is making the light come on. It is expensive at a dealer, but in the long run, might be cheaper than replacing parts until you find the one that is bad. Your problem could be anything from a dirty mass air flow sensor to a bad oxygen sensor, etc, etc.