Original Message
Exhaust backfire cured
By John - 06/10/2006 5:52:20 PM; IP 142.177.110.90
Whenever the points got a little bad on my 428, I would get the odd backfire from the exhaust. So when I started getting those shotgun bangs from the exhaust I naturally checked the ignition first. Turns out in this case, it was something else. I sort of thought it might be, as it was only backfirng out the left side exhaust this time. Turned out to be the exhaust manifold gasket. The bolts had loosened up and the gasket material had eroded down in places and left just the metal screen. Theory is that when I de-accelerate, exhaust scavenges air from the bad gasket and the mixture ignites in the hot muffler. Thought I'd share this with you in case anybody else ever has the same trouble.
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Collapse <b>Exhaust backfire cured</b>&nbsp;-- <font color=#0000ff>John, <i>06/10/2006</i></font>Exhaust backfire cured -- John, 06/10/2006
 Yeah - vacuum leaks can drive you nuts. Thanks for the info. [n/m] -- Mr F, 06/11/2006
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