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Gsxr1250dave



Member Since: 20 Oct 2018
Location: London
Posts: 722

England 

I will check exactly on the age of the install iv got paperwork somewhere. The lpg I had check it over had it plugged in to his laptop and did a check over giving it a clean bill of health.

Except this stalling issue at switch over I'm sure it's a mapping problem iv got some prins lpg software and lead iv never used which is meant to be able to connect to this brc system but I wouldn't know what I was looking at to be honest.

Post #635110 21st Jun 2022 10:26am
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dhallworth



Member Since: 10 Oct 2011
Location: Glasgow
Posts: 2042

United Kingdom 2012 Range Rover Autobiography TDV8 Baltic Blue

Have you got an IID Tool? I'd watch the fuel pressure on petrol as it switches over and see what happens.

On LPG mine was cranking for ages before I fitted the new reducers but the diaphragm had gone in one of them so it was filling the inlet with LPG. There are two little thin rubber pipes that come off the reducers, when you've stopped the car, pull one of them off and listen/sniff it and see if you can smell LPG coming from the reducer.

David. 2002 4.6 Vogue SE - Alveston Red with Lightstone Leather
2007 Range Rover Supercharged in Java Black with Ivory Leather
2012 Range Rover 4.4 TDV8 Autobiography in Baltic Blue with Sand Interior

Post #635111 21st Jun 2022 10:30am
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Gsxr1250dave



Member Since: 20 Oct 2018
Location: London
Posts: 722

England 

Fitted in 2011, yes iv got an ID tool havnt found fuel.pressurw on the live values tho

Post #635124 21st Jun 2022 3:28pm
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Gsxr1250dave



Member Since: 20 Oct 2018
Location: London
Posts: 722

England 

I would have hoped the check up from the lpg would have picked up on that but you never know. He said it had good pressure and was set to run rich because of the engine type. He is pretty good been doing it for years on anything that's runs on lpg

Post #635126 21st Jun 2022 3:31pm
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Gsxr1250dave



Member Since: 20 Oct 2018
Location: London
Posts: 722

England 

It seems the excellent Simon on the lpg forum may have come up with the reason my car stalls when switching from lpg back to petrol, he suggests I may be missing a reducer on the petrol return line to tank. I replaced this almost the 1st day I got the car due to it leaking fuel.

The old rubber hose may have had a reducer fitted internally some where, the suggestion is and I think i agree is that the fuel pressure is to low at the fuel rail when running on lpg it should read almost the same running on petrol or lpg. Just got to connect up a pressure gauge and test it as my ID 11 tool doesn't seem to measure fuel rail pressure on the petrol engine

Post #635453 25th Jun 2022 7:42pm
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