Can an exhaust leak cause a backfire? - Ford Mustang Forums : Corral.net Mustang Forum
 
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post #1 of 3 Old 03-23-2003, 05:50 PM Thread Starter
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Unhappy Can an exhaust leak cause a backfire?

If there is an exhaust leak at the header collector gaskets, could this cause an intermittent backfire out the exhaust?

It occurs when the car is fully warmed up and idling in neutral and happens every few seconds.

This is on a carbed car with a brand new vac secondary Holley and the idle mixture screws 1.5 turns out, with no apparent vaccum leaks.

Any thoughts are appreciated.

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post #2 of 3 Old 03-23-2003, 06:43 PM
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it can make a sound like that

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post #3 of 3 Old 03-24-2003, 04:17 PM
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Hell yes it can!....that extra oxygen can come in and cause the unburnt fuel to ignite...I had a leak in my H-pipe when I installed it wrong....car would make a LOUD bang durring shifts....actualy blew off the smog air pump tube.....

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