I have already replaced the plugs, wires, distributor and rotor. Additionally all the back plugs are black (1, 3 & 5 with #3 the worst). The engine runs rough and has a definite backfire. Could this possibly be an injector? Or could the o2 sensor cause such an obvious misfire?
have the same problem?
Sunday, January 15th, 2012 AT 8:30 PM