tomcat , you stay with the tractor boys then
data thanks mate !!!!!! it was only a suggestion ..... hope your all well over in france x
regards mozz

Hello Mozz, How you doing. To many years on DERV to change now. will give you a bell soon.

So far I am told that the emissions are sky high (which is why it stank), so they've replaced the MAF, but the ECU isn't talking to the Lambda sensor(s), so he has to investigate that. But he doesn't seem to be in any great rush to investigate.

And there's a bit of a water leak, probably from the throttle body (heated?).

still think hes barking up the wrong tree. i cahged my maf but it made things worse , thats when we read the codes found out what all the codes were for and then eliminated them. it could b that there are a lot of codes still stored in there that need eliminating may b wrong of couse but worth a try

Thanks - I've started another thread now.

Basically the problem wasn't LPG particularly. The hydrocarbons & O2 readings were way off and there was a missfire so he replaced the MAF, replaced plugs & leads. It now runs miles better BUT the ECU is not registering any input from the lambda sensors. He tried putting a new sensor in but no joy.

So it is now running much better but the readings are still slightly out of normal. Apparently it will still pass an MOT as the readings on LPG are within tolerance (which are more generous than petrol tolerance) though emissions on petrol are still a bit rich.