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Author Topic: Bit of a wierd LPG problem.  (Read 985 times)

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tigers_gonads

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Re: Bit of a wierd LPG problem.
« Reply #15 on: 26 May 2019, 09:30:39 »

Is it a 4 hole tank, or a single hole tank?


4 Hole so should be easy enough to pull the lpg inlet pipe and engine feed / solenoid pipe.
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tigers_gonads

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Re: Bit of a wierd LPG problem.
« Reply #16 on: 26 May 2019, 09:41:05 »

First thing I would,be doing is to see whats going on with the water temp through the Vap, ie is the Temp Sensor saying its not hot enough, especially if youd having or had Cabin Heater issues.

By all means changed the coolant, but before you do wack some Dish Washer Tablets and skme Fernox or Simular (Home Heater and Radiater Flush), add about 2 egg cup fulls premixed with the Tablets. My money is on the Vap being part blocked or fiilled up with crap

When this issue happens touch the Vap it should hot enough not to leave your hand on it for too long.


Just sent the wife off to the shop to get some  :D
I'll dig some Fernox out later and poor some in the bottle.
As previously said, i'm off to the van first thing Tuesday morning so that's a 130 mile pretty fast run there and back with a bit of town work in between so that should loosen off some or all of the sludge in there then i'll dump it all and replace with fresh mix.  :y


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tigers_gonads

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Re: Bit of a wierd LPG problem.
« Reply #17 on: 27 May 2019, 19:23:06 »

Oh well, 60 miles last night into a fresh tank of LPG and its happened again  :(
Pretty much the same millage as last lime  :(
Tried it this morning on the way to work, no luck  :(
Just got it home and plug the Stag software in ............   MAP 0.33, Gas Pressure 0.60  :'( :'(
Looking more and more like i've got the same problem as Nige  :'(

So, a new tank it is ........
Okay, I think I am pishing in the wind here but is they anyway I can salvage the remaining 30 litres or so  :-\
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tigers_gonads

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Re: Bit of a wierd LPG problem.
« Reply #18 on: 27 May 2019, 20:23:56 »

Also can confirm the vaporiser is getting bloody hot  :y
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Kevin Wood

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Re: Bit of a wierd LPG problem.
« Reply #19 on: 28 May 2019, 09:59:09 »

If you drive it gently can you convince it to run on LPG?

If so, does the tank get extremely cold when you drive it on LPG?

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tigers_gonads

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Re: Bit of a wierd LPG problem.
« Reply #20 on: 28 May 2019, 11:31:52 »

If you drive it gently can you convince it to run on LPG?

If so, does the tank get extremely cold when you drive it on LPG?


Not at the moment Kev.
Iím going to stick a few ltrs more in an see if it runs for a while on the way to skeggy
If I get it running Iíll have a feel
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Re: Bit of a wierd LPG problem.
« Reply #21 on: 28 May 2019, 16:16:19 »

 No chance of getting this to play ball Kev  :(
I put 4 tyres on it back in February.
Iíll check Sunday when I get home if the oppsers had damaged anything under there.
Looks like itís Petrol this week 🙁
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Re: Bit of a wierd LPG problem.
« Reply #22 on: 28 May 2019, 22:36:27 »

Yep, could be they've crushed the LPG pipe with a jack perhaps? :-\
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Re: Bit of a wierd LPG problem.
« Reply #23 on: 29 May 2019, 10:56:00 »

[quote  author=Kevin Wood link=topic=144968.msg1904797#msg1904797 date=1559079387]
Yep, could be they've crushed the LPG pipe with a jack perhaps? :-\
[/quote]


Well just layed out out the grass and had a quick feel  :D
It feels like the fu**wits have jacked the car up using the floor pan 😡
Also it decided to start and run for a couple of miles on lpg then sweet f all again 🙁
 Checked the tank and it was cool
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Shackeng

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Re: Bit of a wierd LPG problem.
« Reply #24 on: 29 May 2019, 12:18:04 »

[quote  author=Kevin Wood link=topic=144968.msg1904797#msg1904797 date=1559079387]
Yep, could be they've crushed the LPG pipe with a jack perhaps? :-\


Well just layed out out the grass and had a quick feel  :D
It feels like the fu**wits have jacked the car up using the floor pan 😡
Also it decided to start and run for a couple of miles on lpg then sweet f all again 🙁
 Checked the tank and it was cool
[/quote]

Why I always stand over tyre fitters, whether they like it or not. >:( >:( >:(
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tigers_gonads

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Re: Bit of a wierd LPG problem.
« Reply #25 on: 05 June 2019, 11:47:28 »

Okay, back from the van and got no work today so its back to the car  :y

On the subject of tyre fitters and floorplan, both sides have been jacked up using the floor  >:( >:( but the lpg pipework / cabling is un affected  :-\

I have just removed the carpet / false floor, removed the gas tight tin cover and cracked off the pipe that feeds the reducer to find it was pressurised with lpg  :o :-\
If my thinking is correct, am I looking at a blockage between the tank and the front end  :-\

The question is ............ where next to check ??
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Re: Bit of a wierd LPG problem.
« Reply #26 on: 05 June 2019, 11:58:59 »

The pipe will be full of liquid LPG all the time, so slackening off the connection will always result in some gas escaping as the liquid boils off. This could mean quite a bit escapes.

Best advice would be to visually check the run of the pipe, IMHO, which it sounds like you've done..

The fact that the fault is so dependent on tank level makes me think that it is most likely to be a tank issue, to be honest. Once the tank is partially full of liquid LPG, the pressure of the liquid being drawn off is almost constant from full to empty, so a restriction in the pipe or further downstream would be equally problematic with a full or a half full tank.
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tigers_gonads

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Re: Bit of a wierd LPG problem.
« Reply #27 on: 05 June 2019, 12:02:55 »

The pipe will be full of liquid LPG all the time, so slackening off the connection will always result in some gas escaping as the liquid boils off. This could mean quite a bit escapes.

Best advice would be to visually check the run of the pipe, IMHO, which it sounds like you've done..

The fact that the fault is so dependent on tank level makes me think that it is most likely to be a tank issue, to be honest. Once the tank is partially full of liquid LPG, the pressure of the liquid being drawn off is almost constant from full to empty, so a restriction in the pipe or further downstream would be equally problematic with a full or a half full tank.



The back end of the car is up in the air on ramps at the moment.

Also, i've just had a play with the Stag software.
I adjusted the minimum working lpg pressure down to 0.3 bar and tried to kick it in again.
The car run on lpg for a couple of seconds then cut back to petrol.


What is the brass screw in attachment which connects the feed pipe to the reducer ??   
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Re: Bit of a wierd LPG problem.
« Reply #28 on: 05 June 2019, 12:13:24 »

Just had a thought (dangerous I know  ;D)

According to the Stag software, the LPG pressure is now 0.25 bar.
As 1 bar is atmospheric, that to me would indicate that the pipework from the tank solenoid forwards is now in a state of vacuum due to the engine momentarily trying to suck vapour through then everything getting locked off with the removal of 12 volts from the tank solenoid hence the ultra low pressure  :-\

IF my theory is right, it can only be the tank ??
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Re: Bit of a wierd LPG problem.
« Reply #29 on: 05 June 2019, 12:21:53 »

The LPG pressure is measured and regulated relative to whatever's in the intake manifold. If the engine is idling this will be about 0.3 bar. If it's stopped or flat out it'll be 1 bar.
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