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Scott, Master Mechanic
Category: Australia Car
Satisfied Customers: 251
Experience:  30 yrs experience with Aussie, Japanese & British cars
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I have a 2010 dedicated gas falcon it has backfired a couple

Customer Question

i have a 2010 dedicated gas falcon it has backfired a couple of times .i had the leads and correct plugs replaced but it has backfired again any suggestions why
Submitted: 1 year ago.
Category: Australia Car
Expert:  Scott replied 1 year ago.

Hi there,
LPG systems, including the Eco LPI, which I assume your Falcon has, are sensitive to running lean or rich, with usually the former resulting in backfire, even on a healthy ignition system.
Also, exhaust leaks, including EGR valve issues may result in backfire through introduction of oxygen to any residual unburnt LPG in the exhaust system.
It could be - an exhaust leak, faulty EGR valve or associated plumbing or even a control system or stepping motor (which governs LPG feed) fault. Any electronic & associated hardware issues should result in an error code, which I assume isn't apparent. You may also have a bad LPG injector, which also won't throw an error code.
I would be consulting an LPG specialist in your area - there's a few of the Eco LPI systems around now so the tech shouldn't be lost on them..
I hope this helps!

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