Well I did the ZC swap (by the way nobody mentioned i would need an SI ECU for the dpfi to mpfi). Finally it idle's really nice but I am getting this crazy surging in the enginewhen I try toaccelerate. It eventually gets over it at highrpm's. But the engine will speed up and slow down back and forth whenI'm just holding thepedal still. My guess are like a vacumm leak or something but does anyone have an idea? I would love some help

 

oaky i see you have a post....it could be your air sensor is really dirty this happened onceto friend of mine and it just had to be cleaned but it was replaced...