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[Taxi_Driver]

Looking at the poor performance an poor economy time to try other things, I get 17mpg on gas booting it with a 2.6

The MV6 managed to get a 2 in the front on a run on gas.

1) Plugs fit new ones LPG hammers plugs
2) Check air filter
3) Does emmisions light come on much? It could be running too rich - can you smell gas.
4) Drive it hard on petrol for a few miles then hard on gas

Anyway I think something is not quite right - I am now thinking rich.

But do try revving it more I think at least 4500 - 5000 and see how it goes - my car is a bit down on torque on gas

I changed the plugs about 12k miles ago.....so is prolly worth changing them again....ive got a new set sitting here
Air Filter.....now thats a possiblity....will have a look at that.....unless vx dealer changed it at its 60k mile service its prolly not been changed in 65k miles.
Emissions light is on about 25% of the time, however i have noticed it seems to be related to where i fill up with gas strangely enough......no carnt smell gas

What will revving it more do for it?

Cheers

[Martin_1962]

Revving it will clear it out - differences - I'd expect 2-3mpg

The plugs should be NGK or Vauxhall

[Martin_1962]

JUst remembered clogged air filters are fatal for LPG consumption

[tunnie]

JUst remembered clogged air filters are fatal for LPG consumption

24mpg LPG + 3 for petrol, so at best still 27mpg??

Something's not right there, drove to my nans today (again) went a differnt way as i went later, 90% motorway 10% town, climate on, fairly full car, 80 all the way: averaged 36mpg

My mpg and performace has got better since I had a new airfilter, the mupets of last owners put the wrong on in, but mine feels at lot less "stuffy" now and performace is back at low revs.

As Martin says maybe an Air Filter change?