How do i fix a diagnosis code P0304 a misfire in 4 in a 1996 Taurus with 3.0L compression good 120 changed plugs wires egr backpressure sensor vacuum solenoid vehicle speed sensor coil pack injector what else?
Answer i hope you didn’t replace all those parts for a 304 code-first when you receive a code p0304 for example that is not a diagnosis-that is a clue to help in the diagnosis-although some of the things you have replaced could have caused the 304 others wouldn’t and if they were replaced for this code you wasted your money-barring any computer fault the things that can cause this code and still have good compression are in no particular order plugs/wires/coil/leaking intake or vacuum leak/broke valve spring/sticking valve/dirty or bad injector/loose or dirty connection on coil/injector/pcm/and please don’t put bosch platinum plugs in this car/cam sensor/synchronizer/low fuel pressure (rare to show on one cylinder but have seen it) and other things-
