Yes, bad fuel can cause backfire, because bad fuel is not good to use. People should always get reed of their bad fuel.
Bad fuel line? Bad fuel filter? Bad fuel tank? Bad throttle body? Bad injectors?
Bad fuel? Bad fuel pump? Bad relay?
probible causes bad fuel pump, bad fuel filter, blown fuse, bad wiring, plugged fuel line, bad fuel pressure regulator, plugged fuel pump suction screen. most likely its just a bad fuel pump. those fuel pumps for carbs and fuel injection systems are cheap and go bad easily. auto zone sells fuel pumps for carbs for $20 and fuel injection pumps are $45
Bad fuel pump, clogged or broken fuel lines, or if it is fuel injected it could be bad fuel injectors.
If the relay is bad, then the fuel pump will not work.
Bad fuel pump, blown fuel pump fuse, bad fuel pump relay, or clogged filter.
A few possibilities could be the fuel pump relay is bad, the fuel pressure regulator is bad, the fuel pump circuit wiring may be bad and maybe the new pump is bad.
bad fuel pump bad fuel pump
I would repair the fuel problem-like a bad fuel pump-or bad relay-or blown fuse-or BLOCKED FUEL FILTER-or out of fuel-or bad fuel-
IF that's what happening, low fuel pressure(bad fuel pump)or bad fuel filter.
sounds like you have a bad cam position sensor,a clogged fuel filter,or a bad fuel pump sounds like you have a bad cam position sensor,a clogged fuel filter,or a bad fuel pump