Question about 1994 Land Rover Discovery

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On lpg vehicle backfires and blows intake pipe to pieces

1993 landrover discovery 3500cc efi catalyst auto twin 40 lt tanks underslung!
been fine for six months last 2 days started to misfire and and blew the intake pipe off between air flow meter and plenum chamber, refited and fine then back fired again destroying intake pipe!! repaired vehicle fine on petrol and ok on gas till back fire!!!

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Hi LPG is very dependent apon plugs and lead quality, the first thing to do is replace them both with new, it may very well cure the fault.

Posted on Feb 08, 2009

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I had a similar Prob on a commodore. Gas fitters were clueless, but a parts retailer said nine times out of ten it's the spark plugs or leads deteriorating. I changed to top gun leads because the plugs were fresh. now no more problems!

Posted on Jun 09, 2009

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Have you had your system completely checked, made sure that all relevant gas pressure is within normal range, and that the engine has correctly been timed and adjusted in order to compensate for the new fuel?

Have all of the plumbing, the guages and the fuel management and delivery system double checked too. I will need to know if the engine is cutting out on idle, or when you are switching the engine over to use LPG. Will also need to know what conventional fuel this vehicle was using.

I hope to hear from you in the near future, but I hope my simple checks do work things out for you.

Yours sincerely

Ouszen

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