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Author Topic: Strange LPG issue - Corsa 1.2  (Read 1263 times)

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zirk

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Strange LPG issue - Corsa 1.2
« on: 05 February 2018, 21:17:57 »

So picked up a little Corsa Van 1.2, the car derived van type, dont laugh its quiet a nippy little thing, its a LPG Dual Fuel badged, bought from a Company so high millage but tons of Vauxhall Service History, LPG wasn't working, hadn't been for a year or so.

Anyway, took a punt and Ive managed to get the LPG working again, it was an electrical problem, it runs sweet on LPG now under all driving conditions, but heres the issue it will run on LPG fpr about 2 miles and then switch back to petrol, run for a couple of more miles on petrol before switching back to LPG and so on and on.

Looking at some of the service history looks like its had a few attempted repairs on the LPG side in the past but not resolved, one of the comments made by Vauxhalls was, it was a LPG Pressure problem but they didn't resolve it?, armed with that info I then filled the LPG Tank up to see if that made any difference, it did, it made it worse, it was then still intermittent but needed to run a lot longer on petrol before switching back to LPG, say 20% LPG then the rest on petrol before switching back again.

let it run like that and noticed it improves as the Tank becomes emptier, to the degree it almost runs perfectly all the time on LPG when the Tank is almost empty before running out.

Any thoughts? Tank or Regulator pressure?, or maybe level sender is intermittently telling the system its out of LPG or something?

I do have another theory, that its nothing to do with pressure and the system is working as it should be and its possibly a temperature problem, in as much I guessing a full tank of LPG is a lot colder than a near empty one and its switching off LPG because the temperature is too low, ie the Vaporizer is getting too cold when running on a full tank of LPG?

So far all ive done is changed the Thermostat, no difference, the coolant seems to get up to temp as it should, be it a bit slow and the Vap does get warm, should it get really hot?, Heater gets hot, Ive also unplugged the Temp Sender on the Vap and that throws a fault and shuts the system down, so that kind of tells me thats working, looking at the pluming it looks like the Vap is plumed in parallel to the Heater matrix, so maybe next stage is to do a flush, but as said heater does get hot.

Any other ideas, or stuff I may have missed?. also thinking about re pluming the Vap in series before the heater, good or bad idea.
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Andy H

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Re: Strange LPG issue - Corsa 1.2
« Reply #1 on: 05 February 2018, 21:29:59 »

You don't mention cleaning/checking the filter(s) in the LPG lines - guessing there should be something in the vap (and maybe something in the tank :-\)
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Andy H

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Re: Strange LPG issue - Corsa 1.2
« Reply #2 on: 05 February 2018, 21:33:00 »

Also seems odd that it runs better when the tank has very little liquid in it :-\ I wonder if the pressure regulator in the vap is shagged
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zirk

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Re: Strange LPG issue - Corsa 1.2
« Reply #3 on: 05 February 2018, 21:35:57 »

You don't mention cleaning/checking the filter(s) in the LPG lines - guessing there should be something in the vap (and maybe something in the tank :-\)
No I didn't, did think about them, but i kinda ruled it out because when it it does run on LPG its perfect, tickover to full boot, but I will take it on board Andy.  ;)
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Kevin Wood

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Re: Strange LPG issue - Corsa 1.2
« Reply #4 on: 05 February 2018, 21:36:22 »

Is the engine running at normal temperature once warmed up? I.E. not overcooling?

I would suspect poor coolant flow through the vapouriser or maybe a problem with the vapouriser itself. Might be worth changing the filters as  a starter for 10.
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zirk

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Re: Strange LPG issue - Corsa 1.2
« Reply #5 on: 05 February 2018, 21:38:36 »

Also seems odd that it runs better when the tank has very little liquid in it :-\ I wonder if the pressure regulator in the vap is shagged
Dont know? thinking it might be the other way around though, ie craps out when the tank is low?  :-\
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zirk

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Re: Strange LPG issue - Corsa 1.2
« Reply #6 on: 05 February 2018, 21:44:11 »

Is the engine running at normal temperature once warmed up? I.E. not overcooling?

I would suspect poor coolant flow through the vapouriser or maybe a problem with the vapouriser itself. Might be worth changing the filters as  a starter for 10.
It seems to, once warm it sits at half way on the gauge (cant remember if thats 85 or 90 now), but its a few degrees before the fan kicks in, as I did some test by going for a quick run with the front grill(s) blocked off and made no difference.

Has been cold last few weeks though?
« Last Edit: 05 February 2018, 21:46:08 by zirk »
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zirk

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Re: Strange LPG issue - Corsa 1.2
« Reply #7 on: 05 February 2018, 21:55:39 »

Thanks, I'll get some filters ordered up and do a Heater and Vap flush just in case theres any crap in there.
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Andy H

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Re: Strange LPG issue - Corsa 1.2
« Reply #8 on: 05 February 2018, 22:29:48 »

The vapouriser doesn't need a particularly high temperature - (room temperature is high enough to turn liquid into gas). What it does need is a good flow of coolant.
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Re: Strange LPG issue - Corsa 1.2
« Reply #9 on: 06 February 2018, 06:29:42 »

After you have changed the filter, if it still acts up, Id be inclined to take it to a lpg specialist and have them check the pressure.
I had a Vectra dual fuel for a while, that kept switching back to petrol. It turned out the pressure needed increasing  :y
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Re: Strange LPG issue - Corsa 1.2
« Reply #10 on: 08 February 2018, 00:47:09 »

Had a bit of trouble with my mv6. You need to get the water to the reducer first then onto the heater. Worked for me.
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Re: Strange LPG issue - Corsa 1.2
« Reply #11 on: 10 February 2018, 11:26:08 »

Right... Is it a Koltek or Necam system? Itís certainly not a Vauxhall system as they never fitted it at the factory (despite it being an option) but fitted it at a UK place before delivery to the dealer.

Assuming it is one of the above mentioned systems it is slightly different and has a LPG ďDistributorĒ instead of the injectors we know about. These are known to clog up and spares are hard to get hold of and very expensive - itís often cheaper to fit a new system than to repair the existing! Thereís loads of info on the LPG Forum, although you may have to look at cached pages.
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Re: Strange LPG issue - Corsa 1.2
« Reply #12 on: 10 February 2018, 13:10:46 »

You'll have a hell of a job finding anyone who can/will work on the Necam system if it's that. I had to track down the installing dealer on my old 3.0
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zirk

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Re: Strange LPG issue - Corsa 1.2
« Reply #13 on: 10 February 2018, 14:05:14 »

Right... Is it a Koltek or Necam system? Itís certainly not a Vauxhall system as they never fitted it at the factory (despite it being an option) but fitted it at a UK place before delivery to the dealer.

Assuming it is one of the above mentioned systems it is slightly different and has a LPG ďDistributorĒ instead of the injectors we know about. These are known to clog up and spares are hard to get hold of and very expensive - itís often cheaper to fit a new system than to repair the existing! Thereís loads of info on the LPG Forum, although you may have to look at cached pages.
Yep LD it is a Koltek / Necam system, having done a bit more homework, it is the later type as fitted by Millbrook, apparently the later ones dont use the earlier Distributor type setup but a more modern Injection (so I gather), they switched around 2004, clue without lifting the bonnet is the older type had a Red Light square change over switch and the later ones had a smaller round Green Led switch?.

Only thing Ive done since posting is giving it a Coolant flush paying particular attention to the Heater Matrix and Vap pipes, its improved a lot but still not perfect, it will now run sweet on LPG full time with a half filled tanked of LPG, attempting to fill to tank up to full reverts back to the issue. So this week some more cleaning additives in the coolant and another flush in a week or so.

Im still thinking its a temp issue, or that could be a contributing factor, so maybe the next flush will tell a story. :-\

Dont really want to spending tons of cash on this getting it upgraded or fixed by a "So Called" LPG Dealer for obvious reasons, quiet pleased with the MPG on it so far though, will happily do 38+ running full time on LPG in stop start London traffic, obliviously a lot more on a run, its just at the moment running out of distance between half fill ups.  ;D

If the next flush doesn't improve things, Im tempted just to do a re plum job on the Vap and hose it in series before the Heater Matrix, just hope that doesn't kill my heater in this current weather.  :-\

 
« Last Edit: 10 February 2018, 14:07:02 by zirk »
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Kevin Wood

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Re: Strange LPG issue - Corsa 1.2
« Reply #14 on: 11 February 2018, 12:30:28 »

I'm curious as to why the tank level makes a difference. In theory, once the tank contains some liquid, it will be at the same pressure regardless of the level. Does the tank get excessively cold after a run on LPG?

Well, the coolant has made a difference, so that's a clue, in my book. Might be worth checking out how to clean the "heavy ends" out of the vapouriser, as it's possible that could affect its efficiency, making it over critical on coolant.

Also, worth jumping out and checking the vapouriser temperature when it switches back to petrol. If the vapouriser freezes up, the coolant passages will start to block, and it's a vicious circle.

Does it tend to switch back to petrol when under lots of load or when idling, or both?
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zirk

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Re: Strange LPG issue - Corsa 1.2
« Reply #15 on: 12 February 2018, 21:06:59 »

I'm curious as to why the tank level makes a difference. In theory, once the tank contains some liquid, it will be at the same pressure regardless of the level. Does the tank get excessively cold after a run on LPG?
This is the bit that I cant get my head around either, as you say pressure should be the same untill your running on fumes, and then it should cut out, which it does as per any other LPG system Ive driven.

So for me, 2 things, Level Sender or Temperature, for now Ive ruled the Tank Level sending, as it pretty much does what it says on the tin. Full Tank, half Full, Empty etc all fine (apart from Vauxhalls stupid "One fuel gauge does Both", which can take up to 10 mins to show the contents between Petrol and LPG on the same gauge, depending what position the LPG switch is, but thats normal).

With reference to the above replies, its probably also worth pointing out that the Flashing Green LED has 3 modes when its in the LPG ON position, Slow Flash = all Normal, running on Petrol, waiting for LPG to kick in, No Flash = running on LPG, Fast Flash = There's an Issue, Forced back to Petrol. Now, the only time it Fast Flashes, is when the Tank is Empty / Run Out and and its forced back to Petrol, ie, the issue is you've run out of Gas, all other times when it reverts back to Petrol as per the issue, the LED flashes normal, which also kind of confirms to me, that its not a Tank Sender issue or has thrown a Fault. Obviously if I tamper with it whilst on LPG, ie, unplug something, like Temp or Vacuum Pipe Sender it will revert back to Petrol and Fast Flash but that is only to be expected.

So Temperature, does a Full tank of LPG compared to a near Empty one deliver LPG to the Vap at a colder temperature, in theory no, in practice?, Im not clear on this, if does and the Vap is just about doing a catch up with its heat then that does kind of explain the issue.

Well, the coolant has made a difference, so that's a clue, in my book. Might be worth checking out how to clean the "heavy ends" out of the vapouriser, as it's possible that could affect its efficiency, making it over critical on coolant.
Ok, on the List, but why is it running perfect with half a Tank or less.  :-\

Also, worth jumping out and checking the vapouriser temperature when it switches back to petrol. If the vapouriser freezes up, the coolant passages will start to block, and it's a vicious circle.
Ive already checked this, the Vap runs from warm to cooler when switching back to Petrol, Not freezing, but cooler sometimes with some condensation present on the body after a run, should these things be hot, if so how hot?

Does it tend to switch back to petrol when under lots of load or when idling, or both?
Doesnt seem to make a lot of difference whether causally ploding along or flooring it, you kind of get a fill for it on distance, its almost like, after a mile or so you think its going to switck back to petrol now, and iy does.  ;D

If you park up with the engine running it will run all day long on LPG until you start to drive again, but I would expect this to be the case even under extreme cold weather, warm static engine bay compared to the chill factor when moving.

« Last Edit: 12 February 2018, 21:10:25 by zirk »
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Kevin Wood

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Re: Strange LPG issue - Corsa 1.2
« Reply #16 on: 12 February 2018, 23:01:11 »

From the behaviour of the LED when it switches to petrol, and also what you've said about the vapouriser temperature, I'd say it's switching back because the vapouriser temperature is too low.

Why this relates to tank level I really can't explain, but every vapouriser I've seen has been too hot to touch when the engine is running and fully hot. It has a coolant jacket around it so it's bound to be if the flow is good. Condensation on it is certainly not right.

I still think it's a coolant flow issue around the vapouriser.
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zirk

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Re: Strange LPG issue - Corsa 1.2
« Reply #17 on: 13 February 2018, 11:32:53 »

From the behaviour of the LED when it switches to petrol, and also what you've said about the vapouriser temperature, I'd say it's switching back because the vapouriser temperature is too low.

Why this relates to tank level I really can't explain, but every vapouriser I've seen has been too hot to touch when the engine is running and fully hot. It has a coolant jacket around it so it's bound to be if the flow is good. Condensation on it is certainly not right.

I still think it's a coolant flow issue around the vapouriser.
Agreed, thanks, I think were both kind off on the same page with this one and the Vap temperature, which is always good to know, Im currently doing another flush, hopefully this weekend so lets see if it improves even further, if it does but not quiet cures it, then maybe a bit more with the Vap and heater matrix and some reverse fushing and check hose flow etc, otherwise a Vap strip down could be in order which Im trying to avoid if poss.

I want try and nail this before the warmer weather hits us, as Ive got a strange feeling this may temporary cure itself only to reappear next winter otherwise.  ;)
« Last Edit: 13 February 2018, 11:37:00 by zirk »
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Kevin Wood

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Re: Strange LPG issue - Corsa 1.2
« Reply #18 on: 13 February 2018, 13:55:48 »

Does the heater work OK?

Just wondering if coolant circulation in general is marginal - broken impeller in the water pump, perhaps?

Also might be worth checking it's not plumbed into the heater matrix bypass path or something. I know it's a "factory LPG" setup, but who knows?
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zirk

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Re: Strange LPG issue - Corsa 1.2
« Reply #19 on: 13 February 2018, 14:12:46 »

Does the heater work OK?

Just wondering if coolant circulation in general is marginal - broken impeller in the water pump, perhaps?

Also might be worth checking it's not plumbed into the heater matrix bypass path or something. I know it's a "factory LPG" setup, but who knows?
Heating works ok, gets hot, could do with getting hotter if I compare with a 1.6 Tigra (that gets piping hot on full blast) thats all Ive got close enough to compare with never had a Corsa.

Water pump, looks brand New, obviously been changed recently, no idea for what reason.

Ive change the Thermostat, wasn't convinced it was that, but 5 min job would be rude not to, no difference.

I did have a quick look at the HBV for that reason, couldn't find it, may be its tucked out of the way as are some of the Hoses, but the Vap is definitely in parallel to the Heater Matrix, as said before was thinking of pumping the Vap in series before the heater but would rather leave as it come from the factory if Im honest.
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Re: Strange LPG issue - Corsa 1.2
« Reply #20 on: 13 February 2018, 15:06:11 »

Yep, you'd hope the factory configuration would work. Many cars (especially without air con) just put the flow through the matrix 100% of the time and blank it off with the air flaps when "cold" is selected, so there may not be a HBV.

Another possibility is that the run to the vapouriser is airlocked somehow so the flow is reduced.

I wonder if it's worth temporarily clamping one of the hoses to the heater matrix to see if that helps? It might help clear any airlock / blockage in the vapouriser circuit, or at least prove that we're onto something if it improves the running on LPG.
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zirk

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Re: Strange LPG issue - Corsa 1.2
« Reply #21 on: 13 February 2018, 15:51:10 »

Yep, you'd hope the factory configuration would work. Many cars (especially without air con) just put the flow through the matrix 100% of the time and blank it off with the air flaps when "cold" is selected, so there may not be a HBV.

Another possibility is that the run to the vapouriser is airlocked somehow so the flow is reduced.

I wonder if it's worth temporarily clamping one of the hoses to the heater matrix to see if that helps? It might help clear any airlock / blockage in the vapouriser circuit, or at least prove that we're onto something if it improves the running on LPG.
Clamp the heater hose before matrix, I like that one, will try that, as you say may force any crap or air out through the Vap.  ;) :y

Im in it tommorow on a trip to London, so just for you Kevin I will freeze my nuts off for the Day and if my fingers still work in the Evening report back  ;D :y
« Last Edit: 13 February 2018, 15:55:31 by zirk »
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Re: Strange LPG issue - Corsa 1.2
« Reply #22 on: 13 February 2018, 16:26:13 »

 ;D
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Re: Strange LPG issue - Corsa 1.2
« Reply #23 on: 13 February 2018, 16:49:42 »

No heater bypass on a Corsa C/D/E, its just a flap based setup
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Re: Strange LPG issue - Corsa 1.2
« Reply #24 on: 13 February 2018, 17:25:17 »

Is the tank mounted correctly?

Just thinking back to an earlier 2.5 conversion done by a certain Army Medic...
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Re: Strange LPG issue - Corsa 1.2
« Reply #25 on: 13 February 2018, 19:08:59 »

No heater bypass on a Corsa C/D/E, its just a flap based setup
:y Thanks, probably explains why I couldn't find it.
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Re: Strange LPG issue - Corsa 1.2
« Reply #26 on: 13 February 2018, 19:13:29 »

Is the tank mounted correctly?

Just thinking back to an earlier 2.5 conversion done by a certain Army Medic...
Was about to say all the Vx Dual Fuels Ive come across are Spare Wheel mounted, except this one its a Cylinder behind the front seats, well I assume its cylinder as its encapsulated in a custom made steel case, I can rip it apart and have a look, how should the Cylinder be mounted position wise?
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Re: Strange LPG issue - Corsa 1.2
« Reply #27 on: 13 February 2018, 21:39:37 »

Valves mounted too high/low or tank inverted when fitted with valves in situ...
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Re: Strange LPG issue - Corsa 1.2
« Reply #28 on: 14 February 2018, 09:13:03 »

Issues with the tank will generally cause the tank to attain a layer of frost when running on LPG.

I would also the LPG system to switch back to petrol with an error indication.
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Re: Strange LPG issue - Corsa 1.2
« Reply #29 on: 14 February 2018, 09:16:38 »

Can you not just put the evaporator in series with the heater matrix, plumbing it in parallel sounds like a stupid approach, the water will always take the path of least resistance.
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Re: Strange LPG issue - Corsa 1.2
« Reply #30 on: 14 February 2018, 13:40:15 »

I am a fan of LPG, having owned 3 LPG cars in the past. LPG around here is available. However the costr of conversion is prohibitive and would probably cost me again what I would pay for the Omega.

I would like an Elite estate with an auto box. I reckon 1.5 to 2k to buy. Then another 1.5k-2k for the LPG. Its going to hurt the purse and I won't see the benefits for many moons.

£1700 will get me a lot of unleaded...
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Re: Strange LPG issue - Corsa 1.2
« Reply #31 on: 14 February 2018, 13:42:26 »

Around £1k I think for a DIY conversion, I'm strongly considering it on my 3.2 Elite.

However I don't really do the miles currently to justify it, filling up just twice a month on petrol. However if that situation changed and my miles went up, I would really get a benefit.
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Re: Strange LPG issue - Corsa 1.2
« Reply #32 on: 14 February 2018, 15:42:31 »

I am a fan of LPG, having owned 3 LPG cars in the past. LPG around here is available. However the costr of conversion is prohibitive and would probably cost me again what I would pay for the Omega.

I would like an Elite estate with an auto box. I reckon 1.5 to 2k to buy. Then another 1.5k-2k for the LPG. Its going to hurt the purse and I won't see the benefits for many moons.

£1700 will get me a lot of unleaded...
Right,     .....well thanks for your input there.
« Last Edit: 14 February 2018, 15:52:05 by zirk »
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Re: Strange LPG issue - Corsa 1.2
« Reply #33 on: 14 February 2018, 15:50:23 »

Around £1k I think for a DIY conversion, I'm strongly considering it on my 3.2 Elite.

However I don't really do the miles currently to justify it, filling up just twice a month on petrol. However if that situation changed and my miles went up, I would really get a benefit.
And thank you Tunnie  ;D,  with a bit of luck I,ll have mine fixed before you decide to convert yours.  :y

For the record bombing around London in my 3.2 LPG,ed Manual is ok, having a little 1.2 run around which delivers 38 plus on LPG in the same Traffic is a no brainer for me.  :y
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Re: Strange LPG issue - Corsa 1.2
« Reply #34 on: 14 February 2018, 20:12:25 »

Sorry Zirk. I posted in the wrong thread! Dumbass I am...
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Re: Strange LPG issue - Corsa 1.2
« Reply #35 on: 14 February 2018, 20:55:46 »

Sorry Zirk. I posted in the wrong thread! Dumbass I am...
Thats ok my friend  :)  I did wonder though  ;D
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Re: Strange LPG issue - Corsa 1.2
« Reply #36 on: 15 February 2018, 09:27:19 »

Can you not just put the evaporator in series with the heater matrix, plumbing it in parallel sounds like a stupid approach, the water will always take the path of least resistance.

This... It is highly unlikely to be a tank issue because of the symptoms :y
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Re: Strange LPG issue - Corsa 1.2
« Reply #37 on: 15 February 2018, 10:03:51 »

See last para of post #1 of this thread. :y
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Re: Strange LPG issue - Corsa 1.2
« Reply #38 on: 18 February 2018, 19:52:17 »

So, just a bit of an update, tried Kevins idea of blocking the Heater hose to the Matrix after the LPG split, couldn't find my plastic hose clamps, but found a my hand held steel vice, clamped it in place with cable ties, idea being I could adjust the flow if needed.

Clamped in the morning when cold and have being running around like it for a couple for days now, difficult to tell on the LPG cutting back to petrol issue as I already had just under half a tank left and my local Morris hasn't had any of its 53p LPG left for a few days now, one thing I have noticed though is from cold it switches to LPG after about 400m from start up, never did that before, more like at least a mile or more in this weather.

Passed Morrisson last night, checked and yea, cheap LPG back on again (not paying BP for there 70p stuff), filled up with LPG, well almost frekin pump packed up half way trough the fill, but managed to get to about 3/4 Full and its staying on LPG all the time now.

unclamped the hose today and checked the coolant, its quiet muck'y and rusty brown, so did another flush and put some more zirks cleaner in there (some diluted Soda Crystals, Fernox and a couple of Dish Washer tablets)will let that do its job for a couple a days before another clean flush and if ready proper Coolant.

So Fingers crossed, will brim it to max with LPG tomorrow, hopefully, I believe Im getting there, will report back.  :)
« Last Edit: 18 February 2018, 20:02:36 by zirk »
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Re: Strange LPG issue - Corsa 1.2
« Reply #39 on: 19 February 2018, 09:39:15 »

Sounds like the advice to move the vap to in-line with the heater was sound; at present it's like you're trying to balance a central heating system and the water is always taking the path of least resistance (the heater) leaving the path of most resistance (vap) clogged and underperforming..
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Re: Strange LPG issue - Corsa 1.2
« Reply #40 on: 19 February 2018, 09:40:37 »

Yep, agreed. Pretty conclusive that the vap. Is not getting enough flow. Plumb it inline with the heater matrix. :y
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Re: Strange LPG issue - Corsa 1.2
« Reply #41 on: 24 February 2018, 13:41:52 »

So, Brimmed it Tuesday, not quiet there, Full Tank still gives Intermittent switch over, however having done about 50 miles next day, it started to run full time on Gas. did another Coolant Flush as still brown crap in there, seems that all this flushing and Kevins Hose block has unblocked a load of crap some where.

Another Flush yesterday, and Brimmed it again last night, so far so good, seems to be running on LPG full time now, and it was bloodly freezing last so night fingers crossed, will keep flushing till clear.

Now, one thing Ive noticed with a full tank of LPG, when parked up after driving I can hear something in the LPG Tank, best description is like a Pendulum slowly swinging and then sounds like its tapping the tank on a swing, and it squeaks, bit like a rusty barn door, will eventually slow down and stop after a few mins. Whats that?, Float Level Chamber or similar?, I though the Level thing was done on Pressure?. Anyway maybe a Red Herring.
« Last Edit: 24 February 2018, 13:44:22 by zirk »
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Re: Strange LPG issue - Corsa 1.2
« Reply #42 on: 24 February 2018, 13:48:19 »

Level is just a float arm. Sounds like that moving ;)
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Re: Strange LPG issue - Corsa 1.2
« Reply #43 on: 24 February 2018, 13:59:13 »

Level is just a float arm. Sounds like that moving ;)
Ah, ok, cheers LD.

Im hoping this was just a case of crap in the Coolant Flow in the Vap or even the Heater Matrix, possibly built up in the Vap or over the Vap Temp sensor or something over time where the LPG system wasnt used for a while by the previous Owner before I fixed the Electrical problem with it and got it working again?
« Last Edit: 24 February 2018, 14:02:03 by zirk »
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Re: Strange LPG issue - Corsa 1.2
« Reply #44 on: 24 February 2018, 15:45:49 »

Sounds to my like a few flushes and replumbing and itíll be good to go :y
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Re: Strange LPG issue - Corsa 1.2
« Reply #45 on: 24 February 2018, 16:16:33 »

Sounds to my like a few flushes and replumbing and itíll be good to go :y
Yea, Im trying to avoid putting the Vap before the Matrix if Im honest, could really do without feeding cooler coolant to the Heater at the moment.  :-\
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Re: Strange LPG issue - Corsa 1.2
« Reply #46 on: 25 February 2018, 11:04:51 »

Sounds to my like a few flushes and replumbing and itíll be good to go :y
Yea, Im trying to avoid putting the Vap before the Matrix if Im honest, could really do without feeding cooler coolant to the Heater at the moment.  :-\

The flip side is that you'll get more flow through the matrix because it's currently being divided into 2 paths.

I suspect that what has happened is that crud has dropped out of the flow and collected in both the matrix and the vapouriser because the flow through both devices is quite slow. Plumbing them in series would sort that for good, I reckon.
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Re: Strange LPG issue - Corsa 1.2
« Reply #47 on: 26 February 2018, 19:45:10 »

Just to add, filled up again this morning, another Brim, and all is good, sweet, LPG kicks in as it should now, even on a luke warm engine thats been stood for a while. will still be doing some planned flushing as still a lot of crap floating around plus I need to get some proper coolant in there. Haven't ruled out the re plumbing, but just too cold at the moment, may be another final reverse flush of the Matrix and Vap and we'll see.

So, end of the day a relatively cheap fix, some Soda Crystals and Dish Washer Tabs  ;) so the moral of the story, if there is one, is keep the coolant clean and up to date, especially if your not using LPG on a regular basis.

I cant help wondering what a LPG specialist would have done or charged for a fix, if any, anyway well pleased so far, and enjoying really cheap motoring, a be it a 6'2' driving around in a 1.2 Noddy Van.  ;D

Thanks all for your input and help.  :y
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Re: Strange LPG issue - Corsa 1.2
« Reply #48 on: 26 February 2018, 20:04:50 »

Well done for sticking with it :y
You got your reward in the end.  :)
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