How do I check gas is comming through

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masonst0rm
Posts: 6
Joined: Fri Oct 24, 2008 5:21 pm
LPG System: viella
Car: Saab 93

How do I check gas is comming through

Post by masonst0rm » Mon Oct 27, 2008 12:39 pm

My LPG has stopped working... when system switches over to LPG it switches straight back.
How can I check that gas is being pumped to the engine...

mak-uk
Posts: 288
Joined: Mon Sep 03, 2007 8:48 pm
LPG System: Prins VSI
Car: BMW 540iA Sport
Location: All over the UK

Re: How do I check gas is comming through

Post by mak-uk » Mon Oct 27, 2008 9:01 pm

You should be able to hear the solenoids 'clicking'?
Mak
Site Owner
2001 BMW 540i Auto Sport Saloon
~300 BHP; ~320 ft/lbs, Prins VSI system

SebastianS
Posts: 12
Joined: Fri Oct 17, 2008 5:56 pm
LPG System: STAG 300

Re: How do I check gas is comming through

Post by SebastianS » Wed Oct 29, 2008 10:50 pm

1.Start from checking an electrical connection on valve between vaporiser/reducer (One which lets liquid LPG run into reducer). If both connections (+12V and ground) are connected,
2. Go to back of car, to LPG tank, where another valve should exist. It is built into multivalve located in LPG tank (most often in luggage area or in spare wheel gap). That should be similar valve, running on the same circuit, as that one near (or in) reducer. They should than work at the same time.
If they are both connected, and not clicking when system turns into LPG,
3. check electrical circuit between ground connector in reducer valve and engine's body,
4. next chek +12V circuit between reducer connector and LPG controller plug (don't forget about pulling of ground cable from battery!)

If both valves are properly connected, electrical circuits between valve(s) and ground and valve(s) and LPG controller are ok, but they're still not working , Your LPG controller is fried unfortunately.

If both valves are connected, both are clicking, and it still doesn't take effect,
5. Find LPG pressure sensor and check it is connected properly. If it is, next
6. Check for LPG pressure in system, between reducer and injectors. If it's too low, engine will not run on LPG, and will switch back to gasoline.

If LPG pressure is ok - LPG pressure sensor seems to be damaged, or LPG controller is gone mud
If LPG pressure is about nothing - Your multivalve in tank may be damaged or jammed, liquid gas copper connection under car may be bended or hitted with some rock, Your reducer may be damaged.
Of course I believe, Your LPG tank is not empty! :)

I think that are all possible reasons.
Good luck with fixing the problem!

Sebastian

masonst0rm
Posts: 6
Joined: Fri Oct 24, 2008 5:21 pm
LPG System: viella
Car: Saab 93

Re: How do I check gas is comming through

Post by masonst0rm » Thu Oct 30, 2008 9:59 pm

Thanks Sabastian... looks like the control unit has gone.. although found front Solenoid is cracked as well but seem to work OK.
So now does anyone know where I can get some parts from?

Ahmad
Posts: 5
Joined: Tue Nov 18, 2008 2:32 pm
LPG System: for Diesel

Re: How do I check gas is comming through

Post by Ahmad » Thu Nov 20, 2008 3:33 pm

masonst0rm wrote:Thanks Sabastian... looks like the control unit has gone.. although found front Solenoid is cracked as well but seem to work OK.
So now does anyone know where I can get some parts from?
Try Tinley Tech in England Tel: 4419 5471 9002 Talk to them if I am not mistaken they have almost all the LPG parts for conversion. Good luck

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