my brother has a 02 mustang 3.8l with 115k miles in great condition no CEL. but he keeps telling me its a piece of **** and he wants to sell it because it wont accelerate and we cant find out the problem.
we put new spark plugs in it and new wires because CEL came on for miss fires. that fixed it but it still randomly miss fires at a red light and shake and fixs itself. but the main problem is when accelerating you and give it 3 quarter throttle and it baaarely wants to move and when you floor it it lags nasty untill 3500rpms and then takes off fast. what could be going wrong?
it does this 90 percent the time and the other 10 percent of the time it drives perfect. its not miss firing when it doesnt wanna go its more like its trying to haul a load waay to heavy for the motor. like its bogged out badly.