Question about 1998 GMC Savana

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Engine shakes only when it starts one it warms up

98 gmc savana engine shakes at idle only when it starts ones it warms up the shaking stops

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Could also be EGR valve needs replaced.

Posted on Jul 31, 2010

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Could ge a leaking injector flooding the engine at start up, or coolant getting into the combustion chamber, either intake or head gasket, do a pressure leakdown test on both fuel and coolant,

Posted on May 09, 2010

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