Volvo S40/V40 (1996 - 2004) - 99 1.6 LPG - 'frontfiring' from air filter

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Sun 25 May 2008 19:51
99 1.6 LPG - 'frontfiring' from air filter - qunvat
hi there,

i bought an LPG converted Volvo v40 ('99) in Jan 2007. the dealer assured me the conversion was done properly but the very next day it went POP!

my girlfriend was so keen on the car we decided to just use it on petrol for a while until we could work out the problem, this was / is my first LPG car...

not long after we took it to an LPG specialist in Cardiff who seems / seemed like a genuine guy and i have no reason to dis trust him but in short we spent approx £500 having the front end of the conversion 're done'

it drove OK for a while until the 'backfires' from the air filter started again and on speaking to the mechanic he explained the original job was so badly done, that he'd have to re do the entire car to make it work properly.

NOT an option for a self employed musician!

2 replacement air filters / pipes later it still continues to backfire (FRONTfire?!) and conks out at low revs (always at the lights)...when on petrol it does not do this and drives OK.

i have no idea of how the gas system works and have an average knowledge of car mechanics....its like the gas 'pump' does not produce enough pressure......OR its not igniting correctly.

i'm getting very fed up of the continuing problem and have no / very little more money to throw at the car.

i can post pics or e mail to anyone who may be able to help!

many thanks in advance, si

Edited by Dynamic Dave on 25/05/2008 at 20:38

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Mon 26 May 2008 10:20
99 1.6 LPG - 'frontfiring' from air filter - steady.eddie
Hi, This is a common fault with the early LPG system, a blowback valve fitted between air intake and air filter should help protect the filter, try a search on ebay.
Hope this helps.
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Mon 26 May 2008 10:35
99 1.6 LPG - 'frontfiring' from air filter - Peter D
I am at a complete loss why you did not take it back to the dealer. Regards Peter
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Mon 26 May 2008 13:35
99 1.6 LPG - 'frontfiring' from air filter - qunvat
so am i.

my girlfriend wanted to keep the car and just run it on petrol...

bad move eh.

i feel like knocking his block off to be honest.

si
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Mon 26 May 2008 10:38
99 1.6 LPG - 'frontfiring' from air filter - steady.eddie
Also, adjustment to the gas mixture should help and is possibly why the car stalls as running too weak.
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Mon 26 May 2008 13:36
99 1.6 LPG - 'frontfiring' from air filter - qunvat
yes ....i think i know where but am not sure, could i e mail you a pic ? ....

si

qunvat AT hotmail DOT com

E-mail cyphered up to prevent harvesting - it appears that it has happened here !

Edited by Pugugly on 26/05/2008 at 13:38

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Mon 26 May 2008 13:34
99 1.6 LPG - 'frontfiring' from air filter - qunvat
will try it many thanks....
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Mon 26 May 2008 13:47
99 1.6 LPG - 'frontfiring' from air filter - qunvat
cheers mate

i've looked on ebay but as i dont really know wot i'm looking for i can only find performance stuff...

i guess its a device that lets air IN to the engine and stops gas / petrol coming OUT?

any help great appreciated!!

si
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Mon 26 May 2008 16:03
99 1.6 LPG - 'frontfiring' from air filter - thomp1983
it will be something like this,

tinyurl.com/6k7we9

although im not sure what size you will need one in.

chris
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