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Piston Misfire

 
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Old 16 May 2011, 05:08 pm
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Join Date: May 2011
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Default Piston Misfire

2007 PT Cruiser - piston 1 misfiring causing slight shake while idling and engine light to come on. Changed plugs, wires and coil, still having same problem. Head gasket changed 1/5/09 and not having any signs that head gasket is bad again; no smoke, oil puddles or hot anti freeze smell. ODB test says piston 1 is misfiring no other codes. Also, put in fuel injection cleaner in tank. Any suggestions? Thank you.
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Old 16 May 2011, 05:24 pm
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Join Date: Sep 2001
Posts: 27,744
Default Re: Piston Misfire

You need a compression check.


Google Search:
A cylinder may misfire due to loss of compression, which may be caused
by a leaking cylinder head gasket, leaking or sticking
cylinder valves, worn pistons, liners or rings, or a
cracked cylinder head or block If loss of compression
pressure causes an engine to misfire, check the
compression pressure of each cylinder

Last edited by CREWZIN; 16 May 2011 at 05:27 pm.
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