i dont have a wiring diagram so i'm a bit clueless, its a prehistoric system too which doesn't help. had an installer look at it a while back 'cor blimey not seen one of them in years, I don't have any tools to work on that anymore'
Enthusiastman
Well-Known Member
I think he is just trying to get you to buy a new system off him mate. Any decent LPG fitted will be able to sort it for you no matter how old it is.
What brand name is your system BTW???? Top branded makes are Prinz and OMVL with a valve lube on them too. Had these on my cars and they never let me down.
he wasn't particularly interested in selling me anything, maybe i look like a cheapskate!? this is the exact ECU, with valtek injectors...
https://www.lpgparts24.de/Bigas-SGIS-3-8-Zylinder-Steuergeraet
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Enthusiastman
Well-Known Member
Never heard of that system before buddy so it must be old and possibly one of the very early systems. Do you know how long its been fitted to your car??? Prior to your ownership i assume??? Have you tried running it OUT OF GAS to see if it then defaults back automatically to petrol???he wasn't particularly interested in selling me anything, maybe i look like a cheapskate!? this is the exact ECU, with valtek injectors...
https://www.lpgparts24.de/Bigas-SGIS-3-8-Zylinder-Steuergeraet
yes very old, the car is 2000, i think it was added within 3 years of new. Maybe I'm not very good at explaining.. it switches between lpg and petrol just fine, its just the switch stays lit up when the ignition is off and one time the injectors were firing with the ignition off
until i flicked the switch back to petrol
he wasn't particularly interested in selling me anything, maybe i look like a cheapskate!? this is the exact ECU, with valtek injectors...
https://www.lpgparts24.de/Bigas-SGIS-3-8-Zylinder-Steuergeraet
@Saint.V8 has been playing with LPG for years. Bet he'd know where to start.
I know nowt about LPG but I am guessing there's a switch to select the option to use LPG. I am also guessing it won't do so without an input from somewhere else telling it it is safe to do so and maybe coolant is hot enough to vapourise the gas in the vapouriser and if all that is true it probably triggers a relay that opens the valve to the tank allowing gas into the vapouriser. That's how I would do it, anyway.
So if gas is constantly getting through I would think something is holding that relay open or some dirt is stuck in the valve (tar?) Or a seal has perished somewhere, possibly around the vapouriser input?
@MrGorsky plays with LPG too. Someone else too, might have been @ukadamwest or @biketeacherdave .
yes very old, the car is 2000, i think it was added within 3 years of new. Maybe I'm not very good at explaining.. it switches between lpg and petrol just fine, its just the switch stays lit up when the ignition is off and one time the injectors were firing with the ignition off
That sounds odd. As far as I am aware it uses the petrol injector pulses to trigger the gas injectors so the car must have thought it was still running? Like I say though, I know nothing about LPG so might be totally wrong.
yep theres a switch which does what its supposed to, when its supposed to. It will only switch on overrun at 2000rpm, over 40c
whats even more odd is very occasionally, it will light up even when i've pulled the main fuse to the LPG
I'll bet thats related somehow
biketeacherdave
Well-Known Member
Yep looks like some wiring somewhere mite be chafing when ignition off the lpg is off.whats even more odd is very occasionally, it will light up even when i've pulled the main fuse to the LPG
Oddly im just servicing my lpg at the moment iv had a slight leak from the coolant hose so orderd my self a service kit for the vapouriser with aluminium elbows.
Have a look where your lpg ECU gets its live feed from it should have been taken from the fuse box direct.
Just don't get me started.I live in Russia when not working and oh my god the things i see.
biketeacherdave
Well-Known Member
Glad all is well with it Alan.Who's Tom??? Yes thanks Dave, regards Alan.
There is a fused connection direct from the battery, the dash switch usually goes dead when i pull the fuse. There must be another 12v coming from somewhere though
frog hopper
Well-Known Member
Something to bear in mind when opening up the LPG system for servicing/changing filters etc, the black deposits you may find within the system are highly carcinogenic. I think they are known as "heavy ends" whatever that means.
Sorry if I'm teaching granny to suck eggs.
Sorry if I'm teaching granny to suck eggs.
Something to bear in mind when opening up the LPG system for servicing/changing filters etc, the black deposits you may find within the system are highly carcinogenic. I think they are known as "heavy ends" whatever that means.
Sorry if I'm teaching granny to suck eggs.
Heavier molecules: longer so more carbon molecules. Tar, in effect. Just about everything to do with petrochemicals is carcinogenic. Mind you, read the COSHH data sheet for sodium chloride and it will put you off your chips.
I think I fixed my last one by strip down, clean up and stuffing a piece of sponge inside the spring. Probably would need replacement occasionally. Other fixes have been making spring from piano wire (who hasn’t got an old ‘grand’ knocking about in the garage somewhere) or a generic spring from an engineering suppliers.Need to find a new spring to fix the boot button
brianp38dse
Well-Known Member
Need to find a new spring to fix the boot button
There a spring on the bay, there was a kit with spring and o ring £15
https://www.ebay.co.uk/itm/Range-Ro...396067?hash=item2d1be31863:g:v0gAAOSw8W9fpz~9
Fourteen how much? For a bit of bent wire!? I'll bend him for that price!!There a spring on the bay, there was a kit with spring and o ring £15
https://www.ebay.co.uk/itm/Range-Ro...396067?hash=item2d1be31863:g:v0gAAOSw8W9fpz~9
brianp38dse
Well-Known Member
Thats what i thought, whoooo muuuch
i have boxes of springs i got from my model enginnering club but really you need one that will not rust
