LPG Discussion Forum

Sounds like you're sorted but I bought a usb-rs232 converter from usbnow.co.uk, the dongle from wtv.co.uk, installed the software and it hooked up first time on my xp laptop.

Not sorted yet. I simply haven't had time to get Rossko to look at it due to work commitments.

I've got a USB-RS232 ...

rossko wrote:You're most welcome to book in with us, but no freebies
01666 838838 M4 J17

I never expect freebies - it devalues your skills and time

I'll give you a call Monday to book the car in

Just filled up at Morrisons in Cribbs Causeway (Bristol). Unleaded 112.9 .... LPG 57.9

ASDA, which is just around the corner from Morrisons is the same. Shell, about 1/2 mile away has LPG at 59.9 but unleaded is the same.

I suspect one of the reasons petrol is dropping more than LPG is that there ...

Is there anyone in the Bristol area with a laptop/Leonardo interface (RS232) that is willing to hook up to my car so I can make some changes to the setup?

I'm having problems with my laptop/Leo interface and can't get the two of them to communicate. Having tried several combinations of COM ports ...

Well I finally managed to get some time to take a look at the vapouriser and regulator.

Started by replacing the hose that goes from the vapouriser to the mixer with some suitable coolant hose and removing the regulator from its housing. Started the car on petrol and checked that the O2 sensor ...

According to Petrolprices...

Morrisons Morrisons Cribbs Causeway Bristol 5.2 miles 46.9p 01-09-2009
Asda Asda Patchway Bristol 5.21 miles 46.9p 02-09-2009
Shell Shell Cribbs Causeway Bristol 5.35 miles 46.9p 28-08-2009


These prices are a little out of date. As of yesterday, when I filled up at ...

Thanks Ross/Gav,

Despite having had most of this week off work I still haven't managed to get out there and do any more. It'll likely be Sunday before I can do anything now ... then it'll probably be raining

Cheers Rossko,

I'm off work tomorrow so I guess it's time to take a serious look at this thing. Without removing the vapouriser I can't see a manufacturers label so I guess its on the back face - I'll see when I get it off.

Having re-read your post I think we may have been at cross purposes re the ...

Hi Rossko,

Can you define "knackered" for me? Are we talking chuck-it-away-and-get-another-one or might-need-some-tlc?

Is there anything special about LPG hose? Can I use coolant hose, for example?

Where is the filter?

If I do need a new one, which do you recommend?

Sorry if there's too many ...

Hi Gilbert, thanks for the response.

I've just been back outside to the car and made some fresh observations.

Firstly, I set the actuator limit to its maximum. Engine is hot.

Running on petrol:
Idle speed fluctuates between 600 and 700rpm
O2 sensor remains in the "lean" area most of the time ...

Okay, so I've just spent the best part of an hour with the laptop connected to the car in an attempt to get it set up correctly ... and failed :(

Despite following Simon's instructions I've still got a system where, at anything above idle, the actuator position increases to the limit set in the ...

Is it a bad move to be starting it on gas straight away once its warm? i was told to start mine on petrol first then wait for it to change over , but it can start on gas immediately , does it increase the blowback risk?

Personally, I start mine on petrol first thing but once the engine has warmed ...

Simon, thanks again for the input. I would never have thought of checking the timing pointer and I wonder if the garage did? I'll see one of the partners tomorrow night and ask him then.

I learned on my previous V8 that using quality ignition parts was essential. The dizzy and rotor arm in this ...

Hi Simon,

I've been too busy driving the car to do much in the way of adjustments. I was gonna hook up the laptop again this weekend but it took me pretty much all of yesterday and today to clean it after some muddy excursions to Salisbury Plain last weekend :)

To date I have only screwed in the ...

Gilbert,

Many thanks for your comments. I was hoping there wasn't much wrong. If it just needs a bit of tweaking then I'll happily dive in with both feet :)

I drive a mixture of short, start/stop and long motorway journeys so maybe that, coupled with the fact the Disco is an automatic, account ...

Okay, so I've hooked up my computer to the Leonardo 175 system on my car (Discovery 3.9, 1996) for the first time. Question is, what did I see and what the hell does it mean?

As far as I can tell the basic settings are right. 0-5V for the TPS and 0-1V for the Lambda sensor. The default actuator ...

e301988325i wrote:Here's an answer for you. Yes. I bought a usb to serial port adaptor from usbnow.co.uk for £13 htmi chipset or whatever. using a newish laptop with xp.

Cheers for the response. I bought an adapter from Maplin for £9.95

I just need some time now to actually get to grips with it

If everything is working as it should, you can't.

That's the thing isn't it? Without the diagnostic software I'm not sure everything is working properly.

Fuel consumption on LPG is significantly higher than on petrol which is not what I am used to from my previous 3.9 Discovery where consumption ...

Okay, so now I know the answer to my question - will the Leo software work via an RS232c-to-USB adaptor?

YES - well on my IBM Thinkpad it does anyway

All I have to do now is learn how to use the software to improve the fuel consumption

Hi Billy,

My laptop isn't particularly new or high tech and is running Windoze XP Home. The problem is the lack of traditional serial port

Thanks for your input