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misfire on ls b18b

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Old 06-05-2013, 07:31 PM
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Default misfire on ls b18b
i am having misfire issues on my b18b at idle it sits there and the exhaust just pops
i found out i was having an intake manifold leak, so i fixed that and it still doing it!

new cap and rotors and spark plug wires and spark plug!
o2 isnt hooked up could that cause the problem?
need help!
thank you
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Old 06-06-2013, 08:59 AM
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Default Re: misfire on ls b18b
CEL???
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Old 06-06-2013, 04:16 PM
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Default Re: misfire on ls b18b
only cel its throwing is a o2 sensor.
i need to hook it up but i dont think it would cause misfire when its sits there and idle and just pops
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Old 06-06-2013, 04:53 PM
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Default Re: misfire on ls b18b
Fix your 02 first before you diagnose any further, why isn't it hooked up?
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Old 06-06-2013, 05:57 PM
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Default Re: misfire on ls b18b
had a cheap eldebrock header someone installed and they welded the 02 bung shut
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Old 06-07-2013, 12:46 AM
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Default Re: misfire on ls b18b
Ok so have a new one welded back in.
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