my buddy blew up his zc and for the time is runnin a single cam b7. he keeps havin problems with it now. when the zc was in it it ran like a champ but with the b7 in it now it idles funny his gauges go haywire and lots of other ****. weve tried different ecu's and still no difference. does anyone know what it could be?

 

the gauges freaking out is a sign of a bad ground.

 

but the whole car is freaking out. the idle is messed up and all sorts of other things. the grounds under the hood are okay. ive already checked them.