Reving problem

[S30TTY]

Right some of you may know i have been fitting a front mount intercooler. Now all is fitted my car had started reving up and down and wont + boost. Any idears what this could be ?

[scottishtaffy]

evreything tight? knocked the maf plug off?  , icv ? should not be doing anything like you describe. think you must have a plug off or something. . have you mixed up vacume pipes or  maybe lost the ristrictor pill out of one.