Don’t forget the O2 sensors…if they are bad…then the vehicle will default to run the engine as RICH as it possibly can by default…since it cannot lean itself out any longer without O2 inputs…this will make you CHUG-A-LUG FUEL…you will smell raw fuel from the tailpipe also…BIG BIG fuel waster…
Also what on earth are you talking about when you said “I can smell gas at tail pipe and can feel the express pressure when it explodes in exhaust pipe”
For Gods sake I certainly hope that there is no EXPLODING of any sort ANYWHERE near your vehicle… I think you are trying to describe something else here and are lacking the vocab… Help me out on that one.
Blackbird