hi, i recently bought a thunderbird sport and i'm getting quite a lot of popping on the overrun when i decelerate. i love the sound but just wondered if it's normal? and what causes it?
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it's quite common as mentioned above... I believe it is a result of un-burned fuel igniting in the exhaust, but I'm sure someone else can give a more scientific explanation.
There are some other threads on this subject with some pretty in depth explanations. Do a search and you should be able to find them. I remember Jimmyj as being one of the main contributors.