Cylinder misfire problem - only when cold. - MINI Cooper Forum

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post #1 of 2 (permalink) Old Jan 8th, 2014, 11:04 PM Thread Starter
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Cylinder misfire problem - only when cold.

I have an annoying problem that my garage cannot sort out. About a mile after cold starting, the engine warning light flashes then stays on and the engine appears to be running on three cylinders. I attach an analyser and it tells me there is a cylinder 1 misfire. I stop the car, restart and the fault disappears. I have replaced plugs, leads and coil. Any ideas? Thanks!
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post #2 of 2 (permalink) Old Jan 9th, 2014, 03:52 PM
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have you tried a compression test? If the ECU noticed something wrong with compression in a cylinder it will cut fueling to it in order to prevent damage to the engine and exhaust by un-burnt petrol. I had a broken valve spring that did the same error for me, I got a misfire if I accelerated hard.
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