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Mulitple Misfire

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jpspeed | 13:16 Mon 09th Nov 2009 | Motoring
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Fault Code PO3OO Mulitple Misfire on my chevy kalos sport. Ht leads and plugs replaced, new coil pack and lambda sensor tested and working yet it still happens, usually when cold and when you load the engine. cam and crank sensors checked. HT leads and coil pack sprayed with wd40. ht leads not shorting. intermittant fault, usually when cold but can happen when engione is warma and doing national speed limit. fuel pump has been suggested as this link is exact same fault as mine
http://www.saxperienc...owthread.php?t=206176
any ideas please?
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