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VZ misfire need help

blackvz

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Dec 15, 2014
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In short, #2 misfire
Replaced
Coil and test
Plug
Cleaned fuel system from filter to injectors
Checked all connections and hoses
No change
Pulling hair out
 

MACE

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Mar 30, 2008
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Hi blackvz

In addition to what you've already done, I would probably do a fuel pressure test to make sure each cylinder is receiving adequate fueling at the right time and if that's all good, I would do a compression check as one of the valves or head gasket may be worn. You may even have a vac leak around the manifold and predominantly that cylinder. Alternatively, I'd hit up the guys on the VZ forum:

VZ Holden Commodore (2004 - 2006)

Kind regards
Damian
 
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