Ok long story short I cleaned up my harness and installed back in my car but now when I attempt to start up it requires a jump no biggy I jump it but it still has problems I does start but it sputters and you hear loud backfire pops and I don't know hat it could be it is a b16 sir obd2a with a jdm p2t so if anyone has any clue please help. Also there's one connector near my alternator it's 3 wires and they are RED/BLUE, RED/WHITE and YELLOW/BLACK

 

why do you need to jump it? bad battery? bad altenator?

 

That's what I thought but the battery is fine and so is the alternator . While I was attaching the harness my friend did try and start the car with no spark wires on could it be that the timing jumped ?