Hi again,
My 1998 (early) 2.0L DTH Diesel Ecotec is developing a new problem in the last week or so after many months without a hitch.
At cold start-up, and/or after a few hours without running, it starts fine but if left idling (750 - 800 RPM) for about half a minute the MIL light comes on and stays. No other light (alternator or oil pressure lights up). If I then drive off, as I rev it a bit, the light goes off and stays off.
There is plenty of vacuum, the EGR is working and the car is generally running fine but it never did this behaviour before and clearly something new is developing.
Before I get the codes read (difficult here as the local Opel dealer doesn't seem to recognise that as a conventional paid job task???) could anyone experienced in these engines suggest the likely cause/problem so I could make sense of the dealer's diagnostic comments when I get one?
The vehicle has done about 125K miles - the last 27K with me. Just when I think I have nailed everything (and it's a very useful performing economic Estate car when all is going O.K.) it throws a new puzzle at me.
Your experiences are welcome as always.
Tony.