John,
Sounds like air is getting into your exhaust system - possibly a leak at the
headers or someplace downstream in the exhaust line. When you back off, air
is sucked into the exhaust system and provides enough oxygen to ignite the
exhaust gases. The result is usually a sharp popping sound - actually a
backfire of sorts. Suggest you check for possible leaks.
Will Seay - B382001570
----- Original Message -----
From: <j.brawley@comcast.net>
> Just a quick question---when driving the car and I decelerate or take foot
> off gas, I get a poping or snapping sound from the exhaust (not
> backfiring). Is this because carb is running lean? Engine is a mild 289
> with headers and runs fine.
>
> Thanks, John
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