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gas backfiring? 

 

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 Post subject: gas backfiring?
Posted: Sat Mar 06, 2010 10:57 pm 
Oompa Loompa
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hey guys

i have a 95 ef on duel fuel and not all the time but half the time when i start the car it backfires the other day it blew out the air box so its starting to worry me.......the last time it had the issue was when the head gasket was blown but its not thagtg this time PLEASE HELP......

tom

 

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 Post subject: Re: gas backfiring?
Posted: Sat Mar 06, 2010 11:27 pm 
QLD Cruise Moderator
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check your spark plugs mine was doing the same thing but i knew i had petrol spark plugs in just went to supercheap and bought some LPG ones and problem gone.
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 Post subject: Re: gas backfiring?
Posted: Sat Mar 06, 2010 11:35 pm 
Oompa Loompa
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thanks mate will give it a go on payday

 

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 Post subject: Re: gas backfiring?
Posted: Sun Mar 07, 2010 1:28 am 
Getting Side Ways
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i hope your not using the accelerator pedal whilst starting

 

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 Post subject: Re: gas backfiring?
Posted: Sun Mar 07, 2010 2:55 pm 
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Yes ^^ i hope you are not using the accelerator while starting the car ! If its Dual Fuel let it fire up then give it gentle revs to switch it over to gas (depending on the system). When my system backfired it cracked my airbox mounts so i had to replace them, but i think water on my Dizzy was the cause due to a big puddle.

Also you shouldnt need L.P.G spark plugs because if its a new system i would start up on petrol and then switch over to gas (if unsure best speak to who ever fitted the system). Check your leads i have heard that thicker ones are better for an L.P.G Application !

 

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 Post subject: Re: gas backfiring?
Posted: Sun Mar 07, 2010 3:19 pm 
Tyre Shredder
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Should never touch accelerator on any efi car whether it is running on gas or petrol. Get the spring clips for the airbox to avoid smashing it to bits.
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 Post subject: Re: gas backfiring?
Posted: Sun Mar 07, 2010 3:39 pm 
Oompa Loompa
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no i dont hit the accelerator my mate i brought the car off learnt that the hard way the system was put in in jan 2009 in sydney so cant go and see the bloke that fitted it

 

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 Post subject: Re: gas backfiring?
Posted: Sun Mar 07, 2010 3:54 pm 
Tyre Shredder
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Don't they have phones in Wodonga?
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 Post subject: Re: gas backfiring?
Posted: Sun Mar 07, 2010 5:29 pm 
Oompa Loompa
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yes they do but my mate that i bought the car off died of cancer 8 months ago and i have no idea who he got to put it in so if you know a way to find out id be happy to know

 

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 Post subject: Re: gas backfiring?
Posted: Sun Mar 07, 2010 8:28 pm 
Getting Side Ways
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Backfires on gas are caused by a lean condition 19 times out of 20. Prime it a little longer before you start it. If you don't have a priming solenoid, try fitting one.

 

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 Post subject: Re: gas backfiring?
Posted: Sun Mar 07, 2010 8:38 pm 
Tyre Shredder
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Legit lpg installs have compliance plates fitted, find out who fitted it and ring them. Think outside the square,
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 Post subject: Re: gas backfiring?
Posted: Sun Mar 07, 2010 10:23 pm 
Stock as a Rock
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nalane wrote:
Legit lpg installs have compliance plates fitted, find out who fitted it and ring them. Think outside the square,


The compliance plate may not have the name of the installer shown as the Roads and Traffic Authority, NSW (RTA) requires a "Workcover Authority (NSW)" to be used and so does not use names but it will use numbers instead like

"Installed by ________ (Lic No)"
"Repair/W'shop _________(Rep No)"

So it could be difficult to find the original installer but you could try going to an LPG specialist or mechanic and they maybe able to help with your issues and even tune it
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 Post subject: Re: gas backfiring?
Posted: Sun Mar 07, 2010 10:31 pm 
Tyre Shredder
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The installers lic no. would tell you who did it.
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 Post subject: Re: gas backfiring?
Posted: Sun Mar 07, 2010 10:41 pm 
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WILDEB wrote:
i hope your not using the accelerator pedal whilst starting


HAHAHA!! I learned this the hard way too with an old 88 EA Ghia I had on gas - Was jump starting it one morning at like 6am after going out all night - Im tired as s**t - just wanna get home and FARRKIN BANG!!! Airbox went bout 5metres in the air and I damn near had a heart attack :shock: :oops:

hope ya get it all sorted mate . . .
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 Post subject: Re: gas backfiring?
Posted: Sun Mar 07, 2010 10:50 pm 
Stock as a Rock
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nalane wrote:
The installers lic no. would tell you who did it.


Yes I know but it will be easier to find a specialist down there to help with it as the install is now over 1 year old.
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