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05 vz idle hiccup

Rod larsen

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Aug 6, 2013
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vg commodore
My mate has a 05 vz after a service of new plugs, oil an filter, coolant. At idle it's development a hiccup can
anyone tell me what mite be the problem
 

WL2005HBD

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Aug 12, 2012
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If he replaced the park plugs, did he replace the gasket after removing the upper manifold? Could be a vacuum leak (I had same issue)
 
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