today i got my skunk2 "IM" installed and right after i left the shop it started to idle really speraticly. the rpms would keep jumping between 1300 and 1600 and my air fuel was running lean. i checked the code and it was reading itle control.then when i drive and i have my foot on the gas it runs fine but as soon as i take my foot off i get a slight jerk....please help!

 

I'd place bets on a vacuum leak. Rechack all the lines on the manifold and throttle body.

CEL?

 

I agree ... most likely vaccum leak