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Author Topic: LPG Problem, misfire under load  (Read 2583 times)

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Lazydocker

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Re: LPG Problem, misfire under load
« Reply #15 on: 25 June 2009, 09:54:04 »

I run my system at about 1.25 bar, with auto switch to petrol over 5200RPM (as it kept bogging down on the 1st to 2nd gear change) and also when out of gas. TBH, now you've got the lead you can have a play, but be sure to save/record/write down the current settings first!
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Omegacraig

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Re: LPG Problem, misfire under load
« Reply #16 on: 25 June 2009, 10:10:28 »

I shall turn the pressure up slightly then as it did sound a little low.

Any ideas on how to change the values? i altered them in the software, but when revisiting it they didnt save to the ecu, do i need the dongle to be able to change these?

Other values in the software were able to be changed and saved when i did, and yes before i touched anything first thing i did was take a copy of the current setup & save it.
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Lazydocker

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Re: LPG Problem, misfire under load
« Reply #17 on: 25 June 2009, 22:02:04 »

Pressure needs a physical adjustment... Probably a large allen key in the centre of the vaporiser :y :y :y
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Omegacraig

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Re: LPG Problem, misfire under load
« Reply #18 on: 25 June 2009, 22:03:51 »

Well ive changed the filter & given all the pipes a good squirt with carb cleaner inside incase of any oil residue, yet the problems are exactly the same as before :(

Ive been doing more research and im not sure the platinum/iridium plugs are the most suitable & could still be the cause of the problem, can anyone else with lpg tell me what type of plugs they have been using?

Other than that im now out of ideas, anyone else with anymore suggestions?
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Lazydocker

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Re: LPG Problem, misfire under load
« Reply #19 on: 26 June 2009, 20:38:24 »

Quote
Well ive changed the filter & given all the pipes a good squirt with carb cleaner inside incase of any oil residue, yet the problems are exactly the same as before :(

Ive been doing more research and im not sure the platinum/iridium plugs are the most suitable & could still be the cause of the problem, can anyone else with lpg tell me what type of plugs they have been using?

Other than that im now out of ideas, anyone else with anymore suggestions?

Standard Vx plugs  :y :y :y
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Omegacraig

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Re: LPG Problem, misfire under load
« Reply #20 on: 26 June 2009, 20:59:58 »

cheers, ive ordered some silver core plugs specifically for lpg cars as a lot of what i could find on the net suggests it will help, failing that i have a set of stock plugs to try as well.

Fortunately on my install the vaporiser is sat right where you can see it so i tweeked the pressure up slightly, now running at just over 1bar with still no difference to the misfiring

If the plugs make no difference, whats the best thing to try next?
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Omegacraig

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Re: LPG Problem, misfire under load
« Reply #21 on: 26 June 2009, 21:01:53 »

Quote
Pressure needs a physical adjustment... Probably a large allen key in the centre of the vaporiser :y :y :y

i realise this was physical ;) had already spotted the vaporiser adjustment at that point,  i was referring to the operation at high rpm & at minimum values, couldnt change those ones :(
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