Update, Being away for a weekend and a ridiculously long delivery on a new lambda sensor have delayed me but I now have news! It might be fixed.... Checked the spark plug in 8 compared to 2, all good. Fitted new lambda sensor and took it for a test drive(petrol only) and it felt like a different...

Many thanks to domino for the technical wizardry. The outside temp calmed down for the trip home and read a much more realistic 14. tnseal - I have not done a compression test, but I would expect a high miss fire count and it not to be intermittent if caused by compression? but we can add...

Domino, that would be great don't think my trusty multimeter will get me too far with these fancy electrics[emoji4]

Thanks for the thought, I have considered probing the MAF to look for fluttering signal and compare the voltages to a 'standard' table I found somewhere. The reason I haven't yet is I ran it for a couple of trips with the MAF disconnected, which to my understanding should mean a default fuel...

Thanks for the advice, as soon as I can figure out this app I will do it properly but for now, I am just outside Edinburgh, Scotland. Yeah sorry for the giant post just wanted to make sure I got all the detail in.

Hi, hoping for some thoughts on my engine woes. I have a 1999 4.0 Thor running LPG, I have owned for 3 months and it ran like a clock. Couple of weeks ago it started 'missing' every now and again on both petrol and LPG, has got progressively worse. Seems to bog down and will not accelerate...