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poor mpg on lpg


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Hi im running my96 disco 3.9i v8 on lpg and only seem to be getting 7-8 mpg where as if i run petrol i get 14-15 mpg i know you get abit less out of lpg.

I have thought about tweaking the mixture screw but as it runs really well on the gas im worried it might upset things and it will take me weeks to get it to run right again any help or advice would be great.

P.S it's a brc system not to sure if it's multipoint or not

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You'll probably need to find someone who can tune LPG systems as i would have thought you should be getting alot more than that and the petrol MPG doesn't sound that good either, might be something like a faulty lambda causing a slight overfuel

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