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Old 08-25-2011, 03:50 PM   #10
daveed
2nd Gear Member
 
Join Date: May 2010
Location: Vancouver
Posts: 97
Like m20 cars intake/vacuum leaks will make these cars idle roughly. For the m42 there is a common mod ("mess under the intake mod") to delete a bunch of unnecessary hoses under the intake manifold. Get new vacuum hoses and intake manifold gaskets. Your air/fuel ratio is probably out of wack.
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