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D2 - Fuel and Exhausts Everything to do with getting fuel into the engine, and fumes back out again

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  #1  
Old 22nd March 2010, 10:40 PM
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Default LPG Guage & questions

Could someone tell me how this works. I've just been doing guess work at the moment. When the light is on the right does that mean its running on petrol and left =s LPG.

Pressing the button alternates between the two? When the light is at its last illumination how much LPG should I have left? What miles are others running LPG getting?

Thanks in advance

Pic of my guage

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Last edited by Singh; 22nd March 2010 at 10:41 PM. Reason: Added pic
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Old 23rd March 2010, 06:48 AM
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All guages will work in a similar fashion.

The green leds in a line indicate how much gas is in the tank.

Beware though as it works on the pressure in the tank, and that wont go down linear-ly, so you get the first light going out very quickly, the next 2 reasonably quickly and the last one normally stays lit for ever and then eventually starts flashing, but still runs for miles after that.

When its on petrol, its normally indicated by a red LED but note that if you are giving it some hoof, it might feed petrol to the engine without necessarily indicating that on the display so bewarned.... It depens how good your system is as to how high up the rev range it will supply that V8 with juice.

Mileage-wise, with the S8 engine I can get max 250 miles, usually nearer 220 but I would expect yours being an ABZ and DTD to get nearer 300 even though it may be a slightly smaller tank.

All you can do is tank it up, reset the trip counter and keep driving. When it runs dry, make a note for next time..... I always drive off the trip counter, the status LED's are largely useless....
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The Family Wagon - 2018 Tesla Model X. Black, 7 Seats, Towbar, Homelink, Enhanced Auto pilot with Summon and self park, Heated front seats, CCS Charger upgrade, MCU2 Upgrade, Falconwing Doors, Self opening / closing doors, Netflix, Spotify, toys, Air suspension, alcantara roof + lots of other stuff......

The 17 year old Driver Wagon 2015 Skoda Citigo Monte Carlo. Alloys, Power steering, Aircon, Leccy windows, Sat Nav, bluetooth, central locking, cup holders, 59 whole bhp. Million times better than my first car. Well jealous.....

The First 20 Audis:

2001 D2 4.2 QS Silver, 1997 D2 S8 Silver, 1999 D2 4.2 Silver, 2002 D2 S8 Dolphin Grey,
2003 C5 RS6 Blue, 1998 D2 S8 Black, 2000 D2 4.2 QS/S8 Ming Blue, 2003 D3 4.2 Ming Blue,
2005 B7 S4 Blue, 2006 D3 3.0 Tdi Black, 1999 D2 4.2 Silver, 2003 D3 4.2 LPG Crystal Blue,
2000 D2 S8 Silver, 2007 3.0 Tdi Q7 Black, 2009 B8 S4 Black, 1998 D2 S8 Agate Grey,
2006 D3 4.2 Tdi Blue, 2006 D3 S8, 2007 Q7 3.0 Tdi, 2006 C6 S6,

The Second 20 Audis:

2011 A7 Sline, 2001 A2 1.4 Tdi Black, 2002 A2 1.4 Tdi Silver, 2006 A8 4.2 Tdi Blue,
2007 4.2 Tdi Q7, 2006 S4 Cab Silver, 2010 RS6 Saloon Black , 2007 TT Roadster,
2010 A8 D4 4.2 Silver, 2006 C6 A6 2.7 Tdi Quattro, 2000 D2 4.2 QS/S8 Ming Blue (again), 2008 Q7 4.2 Black,
2009 C6 RS6 Saloon Daytona Grey, 2001 Fully Loaded A2 Tdi, 2006 Avant S6 Black, 2007 VW Caravelle Exec Black (almost an Audi)
2009 TT Roadster Daytona, 2015 Q7 4.2 tdi lava grey, 2002 GmbH D2 demonstrator, 2006 D3 A8 LWB 4.2 Tdi Black

Most Recent Audis:

2001 A2 1.4 Tdi Black, 2007 4.2 FSi Q7 ABT Blue, 2016 S5 Coupe Launch model, 2004 S4 B6 Cabriolet, 2016 Q7 Sline White, 2006 Q7 4.2 FSi Black, 2012 Q7 Sline+ 4.2Tdi White, 2008 Blue Audi S8

Everything Else

1989 Subaru Justy, 1986 Vauxhall Cartlton 2.0 GL, 1985 Vauxhall Carlton 2.2 CDi, 1987 Ford Sierra XR4x4, 1983 Vauxhall Senator, 1985 Vauxhall Senator 3.0i, 1997 Polo Saloon, 1997 Peugeot 306 1.9 TDi, Ford Sierra Sapphire 2000E, 1990 Subaru Justy, 2000 Subaru Impreza, 2000 Subaru Impreza RB5, 1993 Range Rover LSE, 2005 VW Bora, 2003 Skoda Superb, 2003 VW Passat V6 4 Motion, 1996 Peugeot 106, 2000 Range Rover 4.0, 2019 Tesla Model 3 Performance
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  #3  
Old 23rd March 2010, 07:07 AM
entwisi
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not all guages are pressure driven... I've watched my LPG bloke change a level whose float had punctured whilst the gas sat there boiling away

on mine( 4.2. A8 ) I used to get ~ 250 - 280 per tank full so would look to fill up soon after it hit 230 ish as I had a station at either end of my commute it worked well.

Some systems can be programmed so you can force a start on LPG. Its worth having it configured just in case there is ever an issue with your petrol system. on mine you had to switch it to petrol then switch to gas and hold for 10 seconds to trigger it. The relay would click over and teh light would flash till it started.

The portal stopped working a while ago but I'm happy for my figures to be published at any time if the data is still there.
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Old 23rd March 2010, 08:16 AM
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Ahh, that makes more sense now. When I filled it up it was on the last illumination and I only managed £24 or so in IIRC and I thought that was odd for a 77l tank. How big was your tank Entwisi?
So I'll fill up when it starts flashing from now on. I'm still getting used to having done 200 miles in it and the petrol tank still showing full off to Ben's for a health check later and maybe a MAF change if it needs it, seeing as it made such a diffrence in Mike's car.
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2016 Audi S3 Saloon, Sepang, S-Tronic - B&O, Tech Pack etc... Company Car
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Old 23rd March 2010, 08:23 AM
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Bear in mind you'll only get about 80-90% of your tank full anyway, as it will never truely empty so if you have a 77l tank, expect to get between 60 and 70 l in if you've run it 'dry'

Also, its worth burning some of that petrol off, no sense carting all that weight about, I generally keep my petrol to less than half a tank... plus, it goes off over time anyway, so you dont want it in there for months...

When it 'runs out' it should just switch to petrol automatically and probably start beeping at you.....
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For parts enquiries and Forum User Administration please contact customer services directly, not me - enquiry@a8parts.co.uk, www.a8parts.co.uk, or call 01642 783537

The Daily Town Car - 2023 Tesla Model Y Performance. Black with Black. Giant ipad screen, huge sunroof, 4 wheel drive, Tow bar, lots of ooomph and made in China, so actually built properly unlike the Californian ones.

The Family Wagon - 2018 Tesla Model X. Black, 7 Seats, Towbar, Homelink, Enhanced Auto pilot with Summon and self park, Heated front seats, CCS Charger upgrade, MCU2 Upgrade, Falconwing Doors, Self opening / closing doors, Netflix, Spotify, toys, Air suspension, alcantara roof + lots of other stuff......

The 17 year old Driver Wagon 2015 Skoda Citigo Monte Carlo. Alloys, Power steering, Aircon, Leccy windows, Sat Nav, bluetooth, central locking, cup holders, 59 whole bhp. Million times better than my first car. Well jealous.....

The First 20 Audis:

2001 D2 4.2 QS Silver, 1997 D2 S8 Silver, 1999 D2 4.2 Silver, 2002 D2 S8 Dolphin Grey,
2003 C5 RS6 Blue, 1998 D2 S8 Black, 2000 D2 4.2 QS/S8 Ming Blue, 2003 D3 4.2 Ming Blue,
2005 B7 S4 Blue, 2006 D3 3.0 Tdi Black, 1999 D2 4.2 Silver, 2003 D3 4.2 LPG Crystal Blue,
2000 D2 S8 Silver, 2007 3.0 Tdi Q7 Black, 2009 B8 S4 Black, 1998 D2 S8 Agate Grey,
2006 D3 4.2 Tdi Blue, 2006 D3 S8, 2007 Q7 3.0 Tdi, 2006 C6 S6,

The Second 20 Audis:

2011 A7 Sline, 2001 A2 1.4 Tdi Black, 2002 A2 1.4 Tdi Silver, 2006 A8 4.2 Tdi Blue,
2007 4.2 Tdi Q7, 2006 S4 Cab Silver, 2010 RS6 Saloon Black , 2007 TT Roadster,
2010 A8 D4 4.2 Silver, 2006 C6 A6 2.7 Tdi Quattro, 2000 D2 4.2 QS/S8 Ming Blue (again), 2008 Q7 4.2 Black,
2009 C6 RS6 Saloon Daytona Grey, 2001 Fully Loaded A2 Tdi, 2006 Avant S6 Black, 2007 VW Caravelle Exec Black (almost an Audi)
2009 TT Roadster Daytona, 2015 Q7 4.2 tdi lava grey, 2002 GmbH D2 demonstrator, 2006 D3 A8 LWB 4.2 Tdi Black

Most Recent Audis:

2001 A2 1.4 Tdi Black, 2007 4.2 FSi Q7 ABT Blue, 2016 S5 Coupe Launch model, 2004 S4 B6 Cabriolet, 2016 Q7 Sline White, 2006 Q7 4.2 FSi Black, 2012 Q7 Sline+ 4.2Tdi White, 2008 Blue Audi S8

Everything Else

1989 Subaru Justy, 1986 Vauxhall Cartlton 2.0 GL, 1985 Vauxhall Carlton 2.2 CDi, 1987 Ford Sierra XR4x4, 1983 Vauxhall Senator, 1985 Vauxhall Senator 3.0i, 1997 Polo Saloon, 1997 Peugeot 306 1.9 TDi, Ford Sierra Sapphire 2000E, 1990 Subaru Justy, 2000 Subaru Impreza, 2000 Subaru Impreza RB5, 1993 Range Rover LSE, 2005 VW Bora, 2003 Skoda Superb, 2003 VW Passat V6 4 Motion, 1996 Peugeot 106, 2000 Range Rover 4.0, 2019 Tesla Model 3 Performance
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Old 23rd March 2010, 08:25 AM
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Thanks for the tip Ian, and a very good one that I hadn't thought about. I'll do just that and get it to about a half.
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Old 23rd March 2010, 06:25 PM
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Used up all the LPG today, got 288 miles out of it, 70% motorway and 30% town. So I filled up again. £35 for a full tank, well I got 55 litres in.
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2016 Audi S3 Saloon, Sepang, S-Tronic - B&O, Tech Pack etc... Company Car
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Old 23rd March 2010, 07:42 PM
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Quote:
Originally Posted by Singh View Post
Used up all the LPG today, got 288 miles out of it, 70% motorway and 30% town. So I filled up again. £35 for a full tank, well I got 55 litres in.
All sounds about right to me..... What did you do, just keep driving for the sake of it till it ran out !?
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For parts enquiries and Forum User Administration please contact customer services directly, not me - enquiry@a8parts.co.uk, www.a8parts.co.uk, or call 01642 783537

The Daily Town Car - 2023 Tesla Model Y Performance. Black with Black. Giant ipad screen, huge sunroof, 4 wheel drive, Tow bar, lots of ooomph and made in China, so actually built properly unlike the Californian ones.

The Family Wagon - 2018 Tesla Model X. Black, 7 Seats, Towbar, Homelink, Enhanced Auto pilot with Summon and self park, Heated front seats, CCS Charger upgrade, MCU2 Upgrade, Falconwing Doors, Self opening / closing doors, Netflix, Spotify, toys, Air suspension, alcantara roof + lots of other stuff......

The 17 year old Driver Wagon 2015 Skoda Citigo Monte Carlo. Alloys, Power steering, Aircon, Leccy windows, Sat Nav, bluetooth, central locking, cup holders, 59 whole bhp. Million times better than my first car. Well jealous.....

The First 20 Audis:

2001 D2 4.2 QS Silver, 1997 D2 S8 Silver, 1999 D2 4.2 Silver, 2002 D2 S8 Dolphin Grey,
2003 C5 RS6 Blue, 1998 D2 S8 Black, 2000 D2 4.2 QS/S8 Ming Blue, 2003 D3 4.2 Ming Blue,
2005 B7 S4 Blue, 2006 D3 3.0 Tdi Black, 1999 D2 4.2 Silver, 2003 D3 4.2 LPG Crystal Blue,
2000 D2 S8 Silver, 2007 3.0 Tdi Q7 Black, 2009 B8 S4 Black, 1998 D2 S8 Agate Grey,
2006 D3 4.2 Tdi Blue, 2006 D3 S8, 2007 Q7 3.0 Tdi, 2006 C6 S6,

The Second 20 Audis:

2011 A7 Sline, 2001 A2 1.4 Tdi Black, 2002 A2 1.4 Tdi Silver, 2006 A8 4.2 Tdi Blue,
2007 4.2 Tdi Q7, 2006 S4 Cab Silver, 2010 RS6 Saloon Black , 2007 TT Roadster,
2010 A8 D4 4.2 Silver, 2006 C6 A6 2.7 Tdi Quattro, 2000 D2 4.2 QS/S8 Ming Blue (again), 2008 Q7 4.2 Black,
2009 C6 RS6 Saloon Daytona Grey, 2001 Fully Loaded A2 Tdi, 2006 Avant S6 Black, 2007 VW Caravelle Exec Black (almost an Audi)
2009 TT Roadster Daytona, 2015 Q7 4.2 tdi lava grey, 2002 GmbH D2 demonstrator, 2006 D3 A8 LWB 4.2 Tdi Black

Most Recent Audis:

2001 A2 1.4 Tdi Black, 2007 4.2 FSi Q7 ABT Blue, 2016 S5 Coupe Launch model, 2004 S4 B6 Cabriolet, 2016 Q7 Sline White, 2006 Q7 4.2 FSi Black, 2012 Q7 Sline+ 4.2Tdi White, 2008 Blue Audi S8

Everything Else

1989 Subaru Justy, 1986 Vauxhall Cartlton 2.0 GL, 1985 Vauxhall Carlton 2.2 CDi, 1987 Ford Sierra XR4x4, 1983 Vauxhall Senator, 1985 Vauxhall Senator 3.0i, 1997 Polo Saloon, 1997 Peugeot 306 1.9 TDi, Ford Sierra Sapphire 2000E, 1990 Subaru Justy, 2000 Subaru Impreza, 2000 Subaru Impreza RB5, 1993 Range Rover LSE, 2005 VW Bora, 2003 Skoda Superb, 2003 VW Passat V6 4 Motion, 1996 Peugeot 106, 2000 Range Rover 4.0, 2019 Tesla Model 3 Performance
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Old 23rd March 2010, 08:29 PM
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Nope, I just couldn't find an LPG station, had no sat nav you see and don't know my way around Burton on Trent very well! It started beeping on the M42 on the way home which I am assuming meant it was telling me it was now running on petrol. Gave me a chance to use up some fuel though. Didn't get a flashing light. Ben says my system is the same as Mike's so maybe Mike can comment on weather its meant to flash when it gets low? Going to get the LPG serviced now, hasn't been done in a year and a half.

Just found a 'Find a LPG station' app on the I Phone though which I will download tonight.
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2016 Audi S3 Saloon, Sepang, S-Tronic - B&O, Tech Pack etc... Company Car
1995 Audi A8 4.2 V8 quattro Sport - Bose, Solar, Blinds
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Old 24th March 2010, 08:36 AM
entwisi
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Mine is a 90L tank and I could fit about 75 litres from empty. I always sat at ~ 85 and wasn't shy about gettiong there either. I reckon i could have broken 300 miles if I tried. If Ian can post my data there was one fill where I drove like a nun to see how well it went but got stuck in traffic for an hour on the last journey which brought it down.

Mine didn't flash either ( PRINS ) it was red then would bleep to tell me it had switched over but I had to press teh button to shut it up.

I'm hoping mine is running again by teh time I get home from South Africa but I'm afraid it will only be a case of MOT and then up for sale...... much that I loved driving it it has simply cost me far too much money and I just couldn't face another bill. Someone will be getting a car thats had a lot of stuff done in teh last 12 months

Current list

Gearbox full rebuid
water pump
cam belt and service
alternator
TPS ( i hope its just this.... )
tow bar
LPG service including vapourisor seals/filters etc
more that I can't even remember now......
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