Okay, after 5 months I finally got it running good. I had it brought to my house so I could trouble shoot. I could feel air pressure coming from the front of the engine so I decided to pull the intake. Sure enough the intake was blown from the backfire. I replaced it and not knowing the cause decided to replace the injectors, Plugs and wires since I had it apart. I also replaced the MAF and CPS. The plugs were black and worn. He also had an 02 sensor code so I replaced that. After putting at all back together it still didn't idle smoothly but the backfire was gone. I checked the fuel pressure and it was low so I changed the fuel filter, started it up and YEA it sounds good. I believe the reason for the destructive backfire was from multiple issues.