New to LPG

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Originally Posted by bee utey

The next most common cause of backfires is a very lean mixture during start-up. There should be a relay or control box that allows a short period of petrol injection during starting. It should be adjustable for best results.

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Where abouts can I find this relay/control box to adjust the petrol injection during start up, I'm sure mine isn't set high enough because it still takes ages to start on LPG but if I stopped the car last while it was on petrol it starts straight away.

I highly recommend the Bosch leads/plugs that are being recommended, I took the same recommendations with mine (and also set the timing to 10 degrees BTDC) and haven't had a backfire since...before it was backfiring plenty. Speaking of which I never looked at the air filter after those backfires so I wonder if it's buggered or not...:confused:

A stuffed air filter can single handedly destroy your motor in no time at all.

Suck in some dirty/dusty air and that will go straight through the motor.

I had similar happen to me on a Kombi and a total rebuild was needed. Ouch.

Dammit...how much does a new air filter cost???

Mine cost me $250 from all4x4 in Necastle Which I thought was a good deal as it was Brand new genuine landrover part and is the complete assembly. But I guess it all depends on what you have.

I'm just talking about the actual air filter...and I just got a Ryco one for $20 from Repco, an A-1360. The same model number as what I pulled out of it...not a bad deal! I just need to find another one of those little clips that hold the air filter box in place, mine is missing one for some reason.

Ok just a quick update. Have installed new coil,ignition amp,plugs and leads(all thanks to bee utey an absolute god with lpg) and everything is working really well it runs smooth and has no noticable power loss.


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That is some fantastic information BeeUtey, thanks very much! Your advice was the reason I no longer got any backfires when I first got my Disco, followed your advice with the plugs, leads, and timing...also run 98 premium unleaded in petrol (try to run a quarter of my 30 litre tank to every full tank of gas to keep the injectors clean)...and I haven't had any LPG troubles since (apart from a gummed up converter which needed replacing recently but that was probably already like that when I got it).

Also I still run the Lucas dizzy and it's fine, runs like a dream!

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Originally Posted by pibby

i had my dizzy regraphed for lpg by the mob who make the scorcher. done bugger all driving in it since so can't comment on how it goes.

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Any update on the dizzy mod ?
Would you mind if I asked how much it cost?

Thanks

this will give you an idea of their costs :

Performance Ignition Services - Ask For An Estimate

the advance curve for petrol and lpg are quite different. you can get it regraphed for lpg with static advance 10 btdc to allow you to drive on petrol which is what mine is. i've had electronic controlled ignition on my car before and lpg drove noticably better with the intial set at around 16/17 btdc. so if you drive almost wholly on lpg get it graphed as such. if you're bit on petrol and bit on lpg get the graph like i have.

the car goes bloody well but i've done a number of other things. one of the best bang for buck things for lpg is bee utey's bosch coil conversion.

fuel economy - my car is still killing me. there's still something not right but that's another story altogether.