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Re: rough idle; detonation after valve job
Posted to Technical Discussion Forum on 3/1/2008

intake vacuum at hot idle is ----- should be 18 to 20" and smooth with no flutter or pulsing ... intake vacuum before disassembly was .... ?

using a pressure transducer in the exhaust pipe AceMisfire Detective locates misfire in 12 cyl BMW it is pretty easy... Login to read more.

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