Recent content by trailblazernoob

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    5.3 vortec envoy random misfire/ rough idle

    I've tired this previous with no signs of it surging, :/ I don't remember if I was watching the scan tool when I did it but it didn't give any signs of intake gaskets. I bought them for my other trailblazer 5.3 that needs knock sensors but I'm half tempted to put them in on this one for the...
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    5.3 vortec envoy random misfire/ rough idle

    Interesting, the truck is from Texas so I know 100% that it has zero corrosion or rust and has been in Texas up until last year, it was a garland Texas water department truck, I fear maybe it was idled to death but it has no signs of high idle hours like the trucks I work with in my city of Topeka
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    5.3 vortec envoy random misfire/ rough idle

    Yes the misfires are only at idle, originally I was thinking intake gaskets but he listed in the original posts that the intake gaskets were replaced, I have no coolant loss and no oil usage, I have a good enough scan tool to read that anything above idle shows no misfires. Have not had time to...
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    5.3 vortec envoy random misfire/ rough idle

    I wanna bring this thread back to life due to it being the only thing even close to what I'm dealing with at the moment. I've got a 2006 swb 2wd trailblazer with a 5.3 and only 90k, I replaced all the plugs with oe acdelco iridium's, new plug wires, new throttle body, and tuned PCM. I've got a...

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