p38 Back fire
- Thread starter stevegee
- Start date
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jamesmartin
Well-Known Member
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- 91,879
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- louth lincs
lpg is harder to ignite than petrol so any defect in ignition system shows up on gas before petrol
Ian A
New Member
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- 107
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- Plymouth, Devon
I changed my leads as i sprayed them with GT85 while the engine was running checking for air leaks and the spray caught fire, then i knew then the leads were fooked 
Single point then :suspicious:
Single point then :suspicious:
discomalc
New Member
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- 304
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- Hastings east Sussex
NEed top quality plugs and leads for LPG. Backfire means its running lean i think. Check to see if its fooked your air filter box, it did mine. Ive seen it recommended to replace the plastic box with the older steel ones if this keeps hapening. Is it on the changeover form petrol to gas?
AckAckFlack
New Member
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- 24
Sounds familiar
This did help me
Although I am experiencing it more on petrol
http://www.landyzone.co.uk/lz/f10/p38-4-6l-power-loss-popping-125729.html
This did help me
Although I am experiencing it more on petrol
http://www.landyzone.co.uk/lz/f10/p38-4-6l-power-loss-popping-125729.html
mozz smith
Well-Known Member
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- 1,690
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- tameside manchester
:welcome2:hi steve , dont know if this helps but here goes - have you had the lpg side serviced lately and has the filter been changed ? also check out your plugs and coil packs and leads . lastly if you have a local lpg agent ask him to check the trimming is ok , i personally have had all the above done recently alongside a full service on the car everything is running like a dream . maybe im a lucky chappie but have realised that if you look after these rangies then theyl'l look after you and behave. i have a 2000 4.6 v8 vogue with thor engine k80,ooo . hope above helps cheers mozz
gavbriggs
Well-Known Member
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- 5,861
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- Sheffield uk
just had to do all my plugs, they had deteriated but nothing had shown up. then suddenly iwas unable to run on lpg. changed plugs and its perfect now.
you can get the cable and software for most lpg controllers from ebay. if its a leonardo controller, like mine, i had a fault on one pcb inside the controller that wouldnt allow the stepper valve to open.
it sounds like a service is needed. if your happy to do it yourself then its pretty straight forward, a lead and software is essential tho to set up the lpg system. it is practically a carberetter(not very much different) and with the software you can tune it up in pretty much the same way you would a carb. you can get it something like by ear but it takes a bit of practice to do that so if your new to lpg then i would get the software!!
let us know what system it is(controller/computer) not the vapouriser. and i'll track the software down.
you can get the cable and software for most lpg controllers from ebay. if its a leonardo controller, like mine, i had a fault on one pcb inside the controller that wouldnt allow the stepper valve to open.
it sounds like a service is needed. if your happy to do it yourself then its pretty straight forward, a lead and software is essential tho to set up the lpg system. it is practically a carberetter(not very much different) and with the software you can tune it up in pretty much the same way you would a carb. you can get it something like by ear but it takes a bit of practice to do that so if your new to lpg then i would get the software!!
let us know what system it is(controller/computer) not the vapouriser. and i'll track the software down.
johnmowcop
New Member
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- 31
Came across this once on another lpg vehicle. (Forklift actually)
I was advised it could be condensation in the distributor.
The advice was correct.
Dried it all out with a hot air gun (at a reasonable range). Allwas fine after.
I was advised it could be condensation in the distributor.
The advice was correct.
Dried it all out with a hot air gun (at a reasonable range). Allwas fine after.
igotta90
Banned
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- somewhere over the rainbow
i got muddy boots on so popped in to tell ya ta burn the pile o ****e.:director::director::flame2:
discomalc
New Member
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- 304
- Location
- Hastings east Sussex
Most of the lpg software has the ability to save a file for the ecu settings, go get it set up by your local lpg fitter get him to email you a file with the settings and use this if you ever need to reset, Mine can sometimes need doing if the battery goes flat but its only a five minute job to reset.
