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Knock sensors and misfires

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Old Mar 18, 2022 | 12:29 PM
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Michael Gerace's Avatar
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Default Knock sensors and misfires

Has anyone driven on roads so rough that you can see truck misfire watching the computer? Could that be coming from the knock sensors? Lately I've been getting misfires on my 4.8l when cold starting. Most on #7 & #8. But still on random cylinders. 296,000 miles

Last edited by Michael Gerace; Mar 18, 2022 at 12:31 PM. Reason: Thought of something else
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Old Mar 18, 2022 | 01:15 PM
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What vehicle is this? What are the condition of the coils/plugs/wires? Original knock sensors?
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Old Mar 18, 2022 | 01:34 PM
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Originally Posted by Michael Gerace
Has anyone driven on roads so rough that you can see truck misfire watching the computer? Could that be coming from the knock sensors? Lately I've been getting misfires on my 4.8l when cold starting. Most on #7 & #8. But still on random cylinders. 296,000 miles
It's an 05 Silverado. Knock sensors are original. Put new plugs and wires about 150,000 miles ago. Coils and harness, MAF, TB all else original.
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Old Mar 18, 2022 | 01:36 PM
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Changed intake gaskets a few years back
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Old Mar 18, 2022 | 01:39 PM
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Left Bank has no cat and Right bank is original
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