Matt,

Did this come one all of a sudden, maybe immediately after a start? I had a similar episode, rough start accompanied by a pop, rough and lumpy idle and the economy gauge was 1/2 way (or more) at idle.

Remove the air cleaner and look along the driver's side of the throttle body (RHD driver's side, passenger side for LHD). Look to see if a large vacuum line has come off the nipple. I posted about this a long time ago, I'll try and dig it up.

Hope it helps.

found my earlier post .

__________________
Mike Tangas
'73 280SEL 4.5 (9/72)- RIP
Only 8,173 units built from 5/71 thru 11/72

'02 CLK320 Cabriolet - wifey's mid-life crisis

2012 VW Jetta Sportwagon TDI...at least its a diesel

Non illegitemae carborundum.