Hi I have a 88 GMC 5.7 TBI that was running great . I pulled it out and put it in my Chevy van , using a swap loom and a all new fuel system . ever since I started it up it surges at idle and has a misfire when cold and when hot idle is around 1000 rpm . I have been over everything and all looks good . I am getting codes but don't make much sence. Codes are 32 33 34 42 44 45. Any ideas would be great.