LPG - advice?
Author
Discussion

R12HCO

Original Poster:

826 posts

179 months

Sunday 4th September 2011
quotequote all
Good morning guys.

I have a Land rover discovery 2.0 mpi which has been converted to LPG. It runs fine on petrol but it is hesitant below 2000 rpm on gas, and also when you put it under full load. It runs fine on petrol.

Any idea's what it could be? I know nothing about LPG cars.

  • admin - I haven't put this in the land rover section as I don't think its land rover specific - just general LPG problems*
Thanks guys.

Jem0911

4,415 posts

221 months

Sunday 4th September 2011
quotequote all
I'd take it to a speciallist.
But you could try
HT leads
Spark plugs
Gas filter

Is it single point or multi point injection.

R12HCO

Original Poster:

826 posts

179 months

Sunday 4th September 2011
quotequote all
Closed loop - so that means single point? It was fitted 13k miles ago. Having done a bit of google time, would you think it would need a new filter after that many miles?

Jem0911

4,415 posts

221 months

Sunday 4th September 2011
quotequote all
Dirty gas.
I had mine done every six months on my old gas Land Rover.
Made a big difference.
Not sure on what closed loop is.
Are there pipes into each of the four cylinders?
Or one into the air box?

rswift

1,181 posts

195 months

Sunday 4th September 2011
quotequote all
Ideally should be serviced every 12k or so, depending on the system could have one or two filters at least, as as already pointed out gas can be quite dirty.

On my old LPG car, I would pull the pipes to between the vaporiser, and manifold, inc control valve and clean with carburettor/injection cleaner every few months or so. It certainly helped the issues I had on that car, poor idling/cutting out.

I would suggest a quick look on LPG Forum to, quite a lot of helpful stuff on there.

rswift

1,181 posts

195 months

Sunday 4th September 2011
quotequote all
Ideally should be serviced every 12k or so, depending on the system could have one or two filters at least, as as already pointed out gas can be quite dirty.

On my old LPG car, I would pull the pipes to between the vaporiser, and manifold, inc control valve and clean with carburettor/injection cleaner every few months or so. It certainly helped the issues I had on that car, poor idling/cutting out.

I would suggest a quick look on LPG Forum to, quite a lot of helpful stuff on there.

R12HCO

Original Poster:

826 posts

179 months

Friday 23rd September 2011
quotequote all
Jem0911 said:
Dirty gas.
I had mine done every six months on my old gas Land Rover.
Made a big difference.
Not sure on what closed loop is.
Are there pipes into each of the four cylinders?
Or one into the air box?
There is a bank of four going into the cylinders yes (one for each one I assume). It doesnt have a airbox, but a poxy KnN. Im tempted to buy an original air box.

I took the air flow meter out and plugs out, cleaned them up and now it runs worse.

Jem0911

4,415 posts

221 months

Friday 23rd September 2011
quotequote all
The filter should be easy to spot in the line.
Still advise to change.
Maybe HT leads too?

R12HCO

Original Poster:

826 posts

179 months

Friday 23rd September 2011
quotequote all
Jem0911 said:
The filter should be easy to spot in the line.
Still advise to change.
Maybe HT leads too?
I couldn't get it off when I tried. I didn't want to cut the lines going to it as I don't have a replacement to hand. I keep working to late and not getting the filer like I promise myself. frown

In the morning, Im going to have a look at the plugs again to see what colour they are to give me some indication of what is going on. Last time they were all different. 2 + 4 looked 'iced' over?

Jem0911

4,415 posts

221 months

Friday 23rd September 2011
quotequote all
I've had three gased Range Rovers.
All have run fine.
But when bad running occured it was 'normally' the filter.
I did have one injector fail on the last L332.
£90 sorted that.
The three weeks on petrol cost a smidge more!!!

sploosh

822 posts

228 months

Friday 23rd September 2011
quotequote all
Assuming there isn't a mechanical issue - I'd be asking the person who fitted it to look at the map via a laptop.

It wasn't fitted in South Wales I hope.....

sparkyhx

4,200 posts

224 months

Friday 23rd September 2011
quotequote all
R12HCO said:
Closed loop - so that means single point? It was fitted 13k miles ago. Having done a bit of google time, would you think it would need a new filter after that many miles?
you are running two fuel systems the LPG needs servicing justr like your petrol - when was it last serviced. Probably fuel filter