Is a back-fire normal in the MINI Cooper S?
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fault
The question
Why does our 2008 MINI Cooper S back-fire and is it normal to do so?
Asked by Shane Hickey ยท
Expert answer
Hi Shane,
If this is the exhaust noise we think it is then this is quite normal in the sportier MINIs - it was engineered in! The spark timing is retarded intentionally to allow a small amount of unburned fuel into the exhaust, where it then combusts giving a distinctive sound on the overrun. Many think it sounds sporty.
If it happens at other times then you may have a problem. Best to get it listened to by an expert.
Hope that helps
Answered by Shane O' Donoghue