CYLINDER COMPRESSION

2003 Mini

Tiny

compaqz38

July, 16, 2011 AT 2:34 PM

Hi could you tell me please what the compression should be for a bmw mini coopers works I have tested all four cylinders and am getting 8 bar for all four the reason I have tested them is on cylinder 3 the spark plug is sooty there isnt any power lose there is a slight hesatation on ecellaration in 1st gear I have replaced all 4 plugs and leads do you know what the compression should be and can you tell me what else could be causing a sooty plug on cylinder 3 please thank you

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