| Bill,
This is usually due to air getting into the exhaust system.  I eliminated
deceleration backfiring by sealing some small holes in the resonator 
(not muffler) on my BJ8.  I used stick epoxy/steel.
Mixture(s) too lean causes backfiring through the carburettors.
bs
***************************************************************
Bob Spidell         San Jose, CA        bspidell@comcast.net
'67 Austin-Healey 3000             '56 Austin-Healey 100M
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Subject: question-back firing
> Know this has been discussed before,but someone please refresh my 
> memory.  Are the carbs too rich or too lean when  the cars backfire or 
> pop on deacceleration in particular when going down a hill. 
> The car runs good,I just  feel mine  just does a little too much loud 
> popping on the deacceleration. 
> 
> Thanks
> Bill Pollock
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