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BEHEMOTH99

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Question Asked: My firebird keeps reading po303 and jumps from po302 and po301
May 06, 2013, 05:19 PM
Just did a head gasket job all new wires and plugs.and replaced coil packs and new fuel filter and checked fuel pressure and all is good and to spec and cleaned the maf sensor..changed num 3 and num 2 sparkplug and now its reading misfire num 1..we need help with this one..we are stumped.
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