For the past week my, in the moning when you just turn the key to start it up, everything starts as normal, then about 2 or 3 seconds later the revs start to go up and down usually causing the engine to stall.
Once the car has warmed up everything is normal, car pulls fine and idles fine.
NO engine management light until the engine stalls and no codes found when trying to flash them out.
After car has been stood for 8 or 9 hours (while I'm at work) it starts fine, just seems to be first thing in the morning.
Anyone any ideas on what it could be?
BTW tried a different ICV cause I had a spare in the shed and still the same.
Car is an Astra GSI C20xe
Any help please?