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Author Topic: Bit of a wierd LPG problem.  (Read 1522 times)

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tigers_gonads

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Re: Bit of a wierd LPG problem.
« Reply #30 on: 05 June 2019, 12:26:36 »

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.


With the engine running, the MAP pressure is indeed 0.3 bar but the lpg pressure is holding at 0.6 - 0.3 bar depending on what the stag software setting is .........
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tigers_gonads

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Re: Bit of a wierd LPG problem.
« Reply #31 on: 05 June 2019, 13:05:34 »

Okay, a bare one for one replacement from Tinley delivered to these parts is 222.20  :(
Anybody know of any discount codes ?
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Kevin Wood

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Re: Bit of a wierd LPG problem.
« Reply #32 on: 05 June 2019, 14:00:25 »

Hmm. Something odd here.

Even if the vapouriser is drawing vapour out of the tank rather than liquid, I would expect it to muster a bit of pressure.

Can you start it, switch it over to LPG then swap each injector back to petrol, and see what happens to the vapour pressure?

BTW: the brass item sounds like a filter. Might be worth checking it's not clogged before going too much further.
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tigers_gonads

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Re: Bit of a wierd LPG problem.
« Reply #33 on: 05 June 2019, 14:14:33 »

Hmm. Something odd here.

Even if the vapouriser is drawing vapour out of the tank rather than liquid, I would expect it to muster a bit of pressure.

Can you start it, switch it over to LPG then swap each injector back to petrol, and see what happens to the vapour pressure?

BTW: the brass item sounds like a filter. Might be worth checking it's not clogged before going too much further.



Absolutely no chance of starting anything at the moment Kev.
Due to the tank been 2/3 full, i've been undoing a few things at the back end to relieve some of the pressure  ;)
All i'll say is thank god everybody is at work and there is a nice strong wind blowing  ;D.

One it has cleared so I can start it again, i'll have a play but to be honest, i'm wondering if that brass filter which bolts onto the KME Gold reducer is bunged up or collapsed  :-\




Still doesn't explain why it behaved before / after a fast drive and top up (as in the first few posts)

« Last Edit: 05 June 2019, 14:16:15 by tigers_gonads »
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Re: Bit of a wierd LPG problem.
« Reply #34 on: 05 June 2019, 15:37:19 »

Okay, brass filter removed off the side of the reducer .......... Clear  :y
Feed pipe from the tank to the brass filter .......... Clear   :y

I've also had the fill valve out of the tank. I can confirm it has no discolouration / residue on it  :y



I will need to remove the tank to get safe access to the solenoid valve hence trying everything else first  :)
« Last Edit: 05 June 2019, 15:43:24 by tigers_gonads »
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Entwood

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Re: Bit of a wierd LPG problem.
« Reply #35 on: 05 June 2019, 15:42:45 »

Do you have a filter in the vapour gas line from the evaporator to the injector manifolds ?? That's the one that showed up my problem as it is a very fine filter
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tigers_gonads

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Re: Bit of a wierd LPG problem.
« Reply #36 on: 05 June 2019, 15:44:27 »

Do you have a filter in the vapour gas line from the evaporator to the injector manifolds ?? That's the one that showed up my problem as it is a very fine filter

Yes, there are 2 inline filters Nige.
1 for each bank of injectors  :y

I'll check them next but I do tend to change them every couple of years / approx 10,000 miles  :-\
« Last Edit: 05 June 2019, 15:47:31 by tigers_gonads »
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tigers_gonads

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Re: Bit of a wierd LPG problem.
« Reply #37 on: 05 June 2019, 16:07:48 »

Right, it would seem that I cannot get a gas tight seal on the tank so its been removed on safety grounds and dumped in my back garden.
That way I can make the car safe to run on petrol for work ect.
If I can see nothing else I will take the tank out into the countryside and vent / remove the solenoid valve and see if its breaking down like Nige's did  :-\

Thanks so far lads and all idea's still welcome  :y
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Kevin Wood

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Re: Bit of a wierd LPG problem.
« Reply #38 on: 05 June 2019, 16:59:04 »

Yep, now sit back, light up a cigar and delight in a job well done.  :y

Oh, wait!  :-X
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tigers_gonads

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Re: Bit of a wierd LPG problem.
« Reply #39 on: 05 June 2019, 17:11:03 »

Yep, now sit back, light up a cigar and delight in a job well done.  :y

Oh, wait!  :-X


 ::) ;D ;D

Just a observation from the last 200 miles on petrol
It definitely does go better on the expensive stuff  :y
According to the MID, I managed a distinctly Tunnie like 32 mpg  on the way down to the van :y   





But don't worry  ;)
I soon got very board and its back down to 20.6 mpg over 200 miles  ;D ;D
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aaronjb

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Re: Bit of a wierd LPG problem.
« Reply #40 on: 05 June 2019, 17:13:29 »

Yep, now sit back, light up a cigar and delight in a job well done.  :y

Oh, wait!  :-X

Careful, Hull will end up looking like Brackley...


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tigers_gonads

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Re: Bit of a wierd LPG problem.
« Reply #41 on: 05 June 2019, 17:21:48 »

Yep, now sit back, light up a cigar and delight in a job well done.  :y

Oh, wait!  :-X

Careful, Hull will end up looking like Brackley...




The wife is on about having a BBQ this weekend  :-X ;D



I'd take a note of your post count, quick  ;D
Or is TB over it now  :-\ ;D
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Re: Bit of a wierd LPG problem.
« Reply #42 on: 05 June 2019, 18:35:25 »

Last time he culled my post count I never did get it back.. easy come, easy go ;D ;D
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tigers_gonads

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Re: Bit of a wierd LPG problem.
« Reply #43 on: 06 June 2019, 11:04:04 »

Last time he culled my post count I never did get it back.. easy come, easy go ;D ;D




I'm sure you deserved it  ;D
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tigers_gonads

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Re: Bit of a wierd LPG problem.
« Reply #44 on: 06 June 2019, 11:09:04 »

What is the gas tight blue sealant which is used to seal the threads on the tank ?
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