Decceleration backfire but only RH side

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#1 (permalink)

07-11-2006, 04:09 PM

JCoop

CC Member

Join Date: Feb 2006

Location: Glenwood Landing or Southampton, NY

Cobra Make, Engine: Superformance, FRP460 Big Block

Posts: 975

Not Ranked

Decceleration backfire but only RH side

Hi all,

This just started happening on my SPF/460, and not all the time. It all started when my RH sidepipe support bracket broke (common, I'm told) welded it, broke again, finally welded a bent rod "spine" under it. My collector bolts were lose so I attempted to tighten as best I could. It's really tight in there. No breaks so far, but the backfiring has started. Only as I lift off on the throttle as I shift to the next higher gear.

Is this air getting into the exhaust? Do I have to redo the manifold gasket and collector gasket? Is there a quick fix?

Thanks

__________________
Ray
New York

SPF#1052 11mpg
CAV GT40 MONO29 9mpg
'94 35th Anniversary Rover Mini Cooper 32mpg
'01 MB CL600 V12 18mpg
'08 Volvo S80 18mpg

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