My '96 petrol T4 has just started to play up big time for me!
When the van is started it generally runs as it should, but occasionally when it starts you can feel that it isn't idling correctly and feels a little out of time so to speak. HOWEVER, when the van has been driven say, 5 minutes of regular driving, when stopped at an intersection, etc, where it's in neutral/ the clutch is pushed in, it will idle correctly, then start to run rough before correcting itself, and almost immediately following it will drop its revs right to the very brink of stalling (oil and battery lights come on) before kicking itself back into normal idling until the cycle repeats!
It's now got to the point that itWILL stall if I don't catch the revs before they drop with a little push on the accelerator.

PLEASE HELP