Hello all,

I'm new here (but not to Range Rovers) so please be gentle.

Last week I picked up a nice 98 4.0SE P38 on LPG as a daily runner and a bit of a project (I like to tinker) with a couple of niggles which need sorting, but overall, she is in good shape. I previously owned (about 3 years ago) a 95 DT which I did a fare amount of work on and have missed ever since.

Anyways, appart from a hell of a noise from the rear axle that needs sorting (she currently sounds like a bus, esp on over-run), an in-active sunroof (which appears to be NOT factor fitted), non-active cruise control and generally needing a full service (including diffs, tranny, autobox etc) she is not in bad nick and has a almost full service history, including TWO replacement engines in her time.

One thing that is concerning me though is the fact I put in £50 of LPG on Thursday at 79.9p a litre, did about 164 miles and she is now empty I work that out at about 11MPG... Surely this isn't good? I know it's a 4.0 and that is isn't a prius or anything, but at those figures and the fact the trip computer believes I am doing 18.5MPG, it's only very marginly better than £50 of petrol at £1.30 a litre.

Anyone know of any particular reason for this (I don't have a lead foot, I have actually been trying to get as many miles as possible from her over the weekend) or a way to improve the efficiency of LPG?

Oh and if anyone knows the cheapest place to get LPG in/around Darlington area (County Durham) I am all ears

Any help would be greatly appreciated.

Regards,

Diehard

How are you judging 'empty'?

If you're going by the lpg guage then be aware that they are hopelessly innaccurate. Mine shows empty after 60 miles but I get 235 miles out of a full tank...

Work it out on a full tank to full tank basis. my 4.6 does about 3.5 miles per litre of lpg.
Get the lpg serviced by a reputable gas fitter, new filters, leak check etc, but make sure he dosent lean off the mixturre too much in search of economy or you will start getting backfires and a general running out of steam when you welly it.
I recently joined goautogas they have a pretty good site giving locations and prices but you have to buy an LPG atlas from them to get full access, but its pretty handy anyway and only about £7. also gives you free download of a POI file for your satnav.

I was going off the switch back to petrol as the gauge is nakkered (another 'to-do') lol

Think a service is in order for the lpg, will try that site out too so cheers for that. Just didn't seem that good a saving over petrol

I heard that fitting smaller lpg injectors works too? Anyone had a fiddle? Not too fussed about running out of steam as always got the flip over to petrol if needed

By running out of steam i meant putting your foot down, eg when overtaking and the system not delivering enough gas and just dying, not too clever if your stuck on the wrong side of the road with something coming towards you. I would expect well over 200 miles from £50 of gas. I take it its a multipoint system if it has multiple injectors, not heard of changing jet sizes, best to as someone qualified but idonnt think it sounds like a good idea.

Ok well spent a hour at an lpg man's garage today, very nice fella, confirmed I have a sequential system and after much fettling and teaching me stuff, the conclusion is that one bank of injectors are Duff and hence its dumping more lpg then it should.

So, new injectors it is then...

Diehard said:

Ok well spent a hour at an lpg man's garage today, very nice fella, confirmed I have a sequential system and after much fettling and teaching me stuff, the conclusion is that one bank of injectors are Duff and hence its dumping more lpg then it should.

So, new injectors it is then...

Click to expand...

All my injectors were duff when I bought mine - think yourself lucky!! Luckily my injectors aren't too expensive.