Thread: LPG Backfiring.

There are two types of backfire.
1- caused by unburnt fuel being burnt in the exhaust. Big bang, muffler blown off etc etc. usually caused by intelligent person turning ign on and off or leaking exhaust valve.
2- backfire( or should it be frontfire) , of fuel in the manifold. Usually happens with old vacuum style LPG when the manifold is full of LPG and somehow a cylinder fires (maybe crossfire)with an inlet valve open, or leaking.
Results can be spectacular, with air cleaners blown to bits, MAFs and flapper sensors destroyed. Can be very expensive because of the expensive nature of electronics.
Regards Philip A

Originally Posted by PhilipA

2- backfire( or should it be frontfire) , of fuel in the manifold. Usually happens with old vacuum style LPG when the manifold is full of LPG and somehow a cylinder fires (maybe crossfire)with an inlet valve open, or leaking.
Results can be spectacular, with air cleaners blown to bits, MAFs and flapper sensors destroyed. Can be very expensive because of the expensive nature of electronics.
Regards Philip A

So...could this result in a fire in the air filter box on a Disco 1 fitted with an LPG kit (one of the older types) moments after a loud bang coming from the engine area?

YES.
Regards Philip A

Didn't happen without pics.

That doesn't sound good.

Cheers
Simon

Originally Posted by PhilipA

YES.
Regards Philip A

Thanks for the info!

I was trying to decide who to call first - my insurance or the LPG fitter who did a check up and tune less than a week ago.

Oh, BTW, I my air filter caught fire today...

Originally Posted by abaddonxi

Didn't happen without pics.

That doesn't sound good.

Cheers
Simon

No pics (I didn't wanna rummage around for me camera at the time) but it certainly did happen