LPG Discussion Forum

As part of the ongoing restoration of my 2007 Range Rover Supercharged I’ve removed the LPG kit from the car. I’ve got a 94 litre 4 hole doughnut type tank that fits in the spare wheel well. I don’t have any pictures of this but it’s 100% rust free due to living in the spare wheel well of the car. h...

Sorry to revive an old thread here… I took my cam covers off on Friday night to sort an oil leak on mine and whilst it was off I started to check the valve clearances. They should be between 0.018 and 0.022mm. I couldn’t even get a 0.009mm feeler gauge in on cylinders 1 and 5. 😩 I then noticed whils...

Sorry Simon, I didn’t get a notification email that anybody had responded to my post and I forgot to check back. The reducers on my car are 2 x BRC Genius MB1500s. These were new replacements I fitted at the end of March this year. Since fixing the petrol return solenoid the car has been running per...

A very late update but I wanted to just to put this to bed :) For the last 4 months I’ve not done many miles and due to the engine management light coming on I’ve been running the car on petrol as I didn’t like seeing the orange glow of the management light. Last week I had a problem with the headli...

I had another look at the fuel pressure with the diagnostics today. I noticed the below... When the car changes to petrol the fuel pressure behaves in 2 different ways. Sometimes the pressure slowly trails off and works its way down to a constant 300kpa, other times, it climbs and then just drops of...

I had a good rummage earlier this evening. I tried Plug n Drive 2.06 and it would read the information from the ECU but nothing else. https://i.imgur.com/NiUQAeu.jpg I took the ECU out too and got some more photographs of that. https://i.imgur.com/BwJBsJc.jpg https://i.imgur.com/3y18kHO.jpg https://...

The only changes I've knowingly made to mine was reconnecting a few vacuum pipes that I found were perished when I did some work on the car. Nothing for the LPG has been unplugged or disturbed. I'm hoping to have a look shortly to see if I can find anything obvious that jumps out. I've been looking ...

Thanks for such a detailed answer, Simon. Good point about it not having done it before. I’ve just checked back at the codes I read off it when I first got the car and there were no stored codes for high fuel pressure so it must be a new thing. I’ll have a proper rummage in the ECU box when it dries...

I think I’m going to order something like this: https://tinleytech.co.uk/shop/lpg-parts/system-upgrades/petrol-return-kit/ Hopefully that should cure the fault with the EML. Any recommendations where I should pick up a 12v feed for it? Does it connect easily to the fuel rail on the car? Thanks, David.

I’ve done a few more miles in the RR today. I cleared the EML and then took it for a run, as soon as it switched to LPG the EML came back on with the exact same high fuel pressure fault. I’m going to have a look at it and see if I can find a fuel pressure emulator or similar as I didn’t see any fuel...

Thanks Simon, I couldn’t remember which one you said to try. I’ll give that one a go tomorrow.

The only label on the ECU says Fly SF on it.



David.

I had another look at the RR again this afternoon. I tried one of the BRC LPG software variants and it told me my ECU had been programmed with Sequent 56 so I downloaded Sequent 56 version 1.15 and got an error saying the ECU had been coded with an earlier version. I then downloaded 1.14 and got the...

I had a look at the fuel trims on the car today, the below image shows the figures when the car was turned off: https://i.imgur.com/mPKRW9Q.png The below image is with the car idling: https://i.imgur.com/v2Z7CHp.png I can hear air around the PCV valve when the car is idling so I called the local LR ...

Thanks Simon,

I'll have a rummage for the software and will check them pressures before doing anything then

David.

Thanks Simon, if it’s running as well as it is, I’m hopeful that the bits fitted are a half decent quality. Having it as good as can be will be better then it running like @!## so that’ll do me as long as it’s not a million miles out when you see it :) I’ve been looking through the booklet for the L...

Once we’re allowed to travel again, fancy doing this one?

Hi Simon,

You are indeed correct

At peak boost I’m getting fuel pressure of around 467kPa.



When running on LPG the fuel pressure seems to just sit at a constant 310kPa and once switched back to petrol is sticks at 310kPa and doesn’t move.

Thanks for responding, Simon. :) Well, I had a quick look at it today. Brian was indeed correct. The reducer is leaking LPG into the vacuum pipes. As soon as I switched the car off I pulled one of the vacuum pipes from the reducer and stuck it in a cup of water and it was bubbling like mad. I put my...

Just been out and had a quick look under the bonnet and it looks like you might be onto something, Brian. I pulled one of the vacuum lines off the reducer and there’s a distinct smell of gas in the rubber pipe. I’ll stick the end into a bottle of water tomorrow and see if I can spot any bubbles to b...