Posted this in Vectra-C.com but thought I might get an answer here
I am having an intermittent problem (or problems) with my 05 plate 2.2 Direct. Firstly, very occasionally on acceleration the car seems to mis a beat. Best comparisson I can make is back to when I had a plug fail on my very old astra. It is very occasional though. The spanner has been known to come on when this has happened but it doesn't appear to be storing any fault codes.
Next
On a run down the A1 the other week this happened again, however, the spanner light went out after a few mins to be replaced by the emissions light. The car at this point started chugging, bit like having kangaroo petrol lol.
Stopped, restart engine, all is fine and NO stored fault code.
Help!
Ps I have no EGR valve. The stealers removed it a while back when it had issues and it was replaced with a blanking plate
I have seen this thread and it may be similar
http://www.vectra-c.com/forum/showthread.php?t=44729