Hi everyone,
We've gotten back from our ninth trip to southern Italy in the Omega, but this time she developed a severe miss just south of Naples. I checked her over and found a little mayo on the overflow cap and some drops of oil in the water, but the oil was ok and temperature ran fine.
I kept an eye on everything and running on five cylinders (occasionally with severe knock) we managed to get back to the UK.
Since we got back, the miss has almost completely gone away but there is quite a lot of oil in the cooling system now.
I have dropped it with my mechanic who thinks the oil cooler has failed and that the miss is something else.
So now I'm trying to work out what caused the severe misfiring and knocking!
Actually for some time now, when I start the car from cold, it soon starts miss firing until it gets so bad that it nearly stalls. As soon as it warms up, it goes away, all of which suggests some sort of ECU or sensor problem.
It's worth mentioning that the engine light has been on for some time due to the lambda sensors. I assumed this is because of the well known cat issue with V6 engines, but now I wonder? Also, it has an LPG conversion.
Before I start changing random sensors I would appreciate some input.
Thanks in advance.
Dominic