so you and my mech is on the same track by saying that it can be a valve or the timing belt, my mech say he will strip it and check ill let you know what he say.
Hi i have a FORD EXPLORER 4L V6 1997 i it dont want to start we check the fuel pump and spark plugs and thats fine when you start it back fires by the part where the air filter is can it be a valve or timing chain .