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September 29th, 2008

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Q & A: Exhaust Backfire

Tuesday January 03rd, 2006
Q & A, MGA, MGB, MGC, MG T-Type, Midget
I have a 1980 MGB.

When I slow up the exhaust has a back fire or coughing loud sound.

What do I look for?

Chuck
Chuck!

When you slow down quickly the cylinders cannot get enough air/fuel mixture to combust. The uncombusted air/fuel mixture then passes into the exhaust. If fresh air is added, either through an air pump (emission control) or... read more