Backfire on overrun

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JOHNCOOPER47
Posts: 1
Joined: Sat Oct 06, 2018 11:59

Backfire on overrun

Post by JOHNCOOPER47 »

Sorry if this is a stupid question. My 1990 Portuguese Moke has started to backfire on the overrun. I have adjusted the mixture as she was running rich but the mixture was adjusted a month ago as she failed the MOT because emissions were too high.

Any pointers would be a great help. Many thanks in advance
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