I'm getting code 12,43,55. Any ideas of where to start? Not worried with the 12 or 55.lol
Background info on car is:car kept popping the 25amp fuse to the fuel pump,checked wiring to crank sensor and o2 no frays or cuts there. Ended up replaceing fuel pump after letting car sit for 9 months or so(got disgusted with it).
Over year ago when I got the car I replaced coil with MSD coil,wires,crank sensor&pigtail,underdrive crank pulley,EGR valve. Car already had header,gutted converter,flowmaster,homemadeCAI,solid mounts,shaved head and new head gasket when I got it. Oh yeah and I added a booger bar. Just put new plugs in it too. So I really haven't driven it past my neighborhood yet because I don't know if the fuel pump fixed the fuse popping yet and now its idleing rough/setting codes

 

Does it continue to idle rough? Check the leads on the coil pack and all the connections. Also could be a faulty/plugged injector.

 

Yeah,maybe just a lil more so after the plug change. Injecters might be a good place to look since they have some miles on them and I did drop the tank and replace the fuel pump.
Know what poundage they are stock? I have some stock 19 mustang and 24 camaro ones laying here in the garage.

 

19 lbs.