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  1. N

    Rough running 1999 4.0

    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...
  2. N

    Rough running 1999 4.0

    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...
  3. N

    Rough running 1999 4.0

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

    Rough running 1999 4.0

    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...
  5. N

    Rough running 1999 4.0

    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.
  6. N

    Rough running 1999 4.0

    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...
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