LPGinfo.co.uk - Unbiased Autogas!

When sitting around a while, it's worth getting it serviced on both the petrol and LPG.

Anything between -10 and +10 fuel trim is seen as acceptable so between -5 and +5 is very good indeed.

Hi Hugh,

It would make sense that faulty (or missing) coolant temp sensor could cause this. Let us know how you get on.

True, but worth doing if you want the LPG side to run properly and at all rev-ranges (and to avoid any engine damage whilst on LPG and it cannot cope and runs lean).

Report back with what you decide to do.

Hi Nigel,

I am not sure about a non-CAT car but certainly on a CAT car there is no gas smell out of the rear... just standard fumes.

Regards.

Mak

Hi Nigel and Welcome! Firstly, surely the fuel tank can be repaired or you could source a second hand one? Some LPG systems do not allow you to run solely on LPG, some don't start well on LPG and if there is no petrol in the tank, some fuel pumps can burn out. As regards to the LPG installation, if ...

You really need to take it back to whoever fitted the rail for you so they can diagnose the LPG ECU. Could be a number of things (e.g. incorrect switch over paramters or incorrectly plumbed heater hoses).

For a 4 cylinder you will probably need to have twin injectors.. therefore, a V8 system, as well as two reducers and then obviously the associated mapping of the VSI system. Oh and it would need to be getting sufficient fuel from the LPG tank too.

Hi

Is that a 4 cylinder or 6? What are 555's?

I expect you will need two reducers for a start.

Hi

As far as I am aware, there is no actual difference in the plugs - I was under the impression that the LPG ones are iridium too but branded 'LPG'.. maybe a different gap or something.

Maybe contact NGK UK direct for clarification?