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Car backfired on new LPG system? 


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 Post subject: Car backfired on new LPG system?
Posted: Wed Nov 14, 2007 5:01 pm 
Getting Side Ways

Posts: 597

Joined: 4th May 2007

Ride: 1992 EBII Fairmont

Location: Aga
VIC, Australia

Ok so I got a new LPG system fitted yesterday.

Tonight I was out with my mates and we had 2 cars.

I was driving my mates car and he was driving mine.

Now here's the deal.

We stopped for around 10 minutes with the cars off and when we were off again my mate noticed a putt putt noise from my exhaust and starting revving the car up slightly to see if anything else happened. The sound stopped after say one minute.

So he went to take off and after the car traveled say 10 meters we heard a huge pop noise like basically backfiring and the car just cut out.

Scared the hell out off me and the airbox was fine same as the air filter, I think it came from the exhaust. Plugs are 6000k's old, leads are good according to G & D.

Now what could be the cause of this???

System is an Impco clone setup (Elko) and the car was at normal operating temperature.

It sounded so unhealthy and do not want it to happen again so does anybody have a clue on what happened?

Posted: Thu Nov 15, 2007 6:53 am 
Getting Side Ways
User avatar

Age: 45

Posts: 1953

Joined: 1st Feb 2006

Gallery: 25 images

Ride: BA on gas. EL on gas. XF on gas.

Location: Greenacres/Adelaide
SA, Australia

The leads may be ok, but you need gas compatable leads and plugs for a start.
Then take it back to the fitter for a checkup.
You may also want to check how tight the intake to head bolts are.



Member Number 8804

Posted: Thu Nov 15, 2007 4:02 pm 
Getting Side Ways
User avatar

Age: 39

Posts: 520

Joined: 23rd Dec 2005

Ride: EF Futura Wagon

Location: Toowoomba
QLD, Australia

Also make sure that they change the PCV valve for a steel one. Do that ASAP. The plastic ones will drop the check ball into the engine with a half decent back fire then BANG. There goes your chain, timing cover, guides and $500. DO IT NOW!




If it doesn't fit, jam it. If that doesn't work use a hammer. - Engineers Motto

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