2004 Disco turns off in reverse

[Cottingham]

Thor - thanks for getting back to me. When I say I use V-Power every 5 - 6,000 miles, I mean the small gas treatment bottle. Seems like by your last posting you are saying fill up with Shell V-Power gas all the time?

MAFS is Mass Air Flow Sensor. I've heard good and bad things about using a MAFS cleaner to essentially spray clean the sensitive electirical parts and sensor. They make cleaners specifically for this. Of course, it's always a crap shoot.

I used to own a 1999 Disco II (one of the first accross the pond) and drove that thing to 189,000 miles. When I had it, of course BMW owned LR and techs said never to use gas treatments. When Ford bought LR, they began upselling gas treatments at the dealerships! So, who knows?

[Mjollnir]

Yes, fill up with Shell V-Power gasoline consistently and ditch the V-Power additive in favor of Gumout All In One with every oil change (3k). Not only is it more concentrated, but is is good for up to 35 gallons. The V-Power additive is only good for 21 gallons, which is not enough since the Disco II has a 24.5 gallon tank. It also helps that Gumout is owned by SOPUS- Shell Oil Products United States.
Thanks for explaining the MAFS. As it is much different on the 4.6L than my 4.0L, I could not advise on how to maintain such an item, but I can say that I have never heard of spraying anything on it. The advice I always followed was replace it when it goes bad. I cannot imagine spraying an electronic device can be good. Shocking maybe, but not good.
The '99 DII I have just clicked 105K, and thankfully everything works just fine. I am convinced that the V-Power fuel and Gumout have a lot to do with that, but go to Wal-Mart for the additive as it is only $8.96 per bottle, and worth every penny.
Still, I recommend visiting a LR specialist ASAP. If it stalls while you are driving, well, that would be a very bad thing indeed.
Also, the LR techs advising against the DII you had were probably right, as the composition of fuels are different overseas. My understanding, and my memory from decades ago, is that the European fuels are much higher octane and thus more efficient. Here, the best we can get is 93 out East, 91 in the West. Our fuels, as good as they are, need all the help they can get.