Common I think but what is it ????????????
This is weird and is intermitent.
The XElump in question sometimes runs fine but other times when driving and the clutch is depressed the Revs drop to almost a point where the engine stalls but then it picks up again suddenly revving upto around 2000 revs before setling again at 1000 rpm all this whilst the clutch is depressed and free wheeling.
I have cleaned the idle control valve and checked all vacuum pipes, cleaned oil breather hoses/plugs.
Any of you experienced Vauxhall lads / ladettes can help me with solving this annoying problem on quite a tasty looking car?
This is it's only let down.