[rollthelosingdice]

I replaced the fuel pump now I got p0300 code and the engine misfires like crazy. What the hell is wrong? I was getting rough idle after warm up now this happens.. Please anyone help?

 

[bobus8]

It wasn't clear if you were getting the rough idle after warm up before you replaced the pump or afterward. If it was before, maybe you just need a set of plugs and wires. If it was afterward, check the fuel pressure of the new pump. Maybe it is a bad new pump.