PCM Diagnostics & Tuning HP Tuners | Holley | Diablo

Tuning idle/false knock

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Old May 4, 2017 | 09:51 PM
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Default Tuning idle/false knock

Just finished building a 6.0 for my 2500hd. Right after I finished my maf went bad so it'd randomly dump a bunch of fuel and run real rich and not very good obviously. I'm wondering if this fouled my plugs. More often then not, slowing down, like for a stop sign, it will idle like its got a huge cam in it. If you drive two footed and keep the gas peddle down just a tad, its fine. If not, around the time you stop or just before, it dies. Usually needs a little gas to start back up, then it runs fine till you stop again. Tuning or bad plugs? I plan on checking them in 300 miles when I change out my break in oil, just curious.

And on the false knock, what is there for solutions to this? Running 24° timing. 91 octane fuel. Wot at around 4800, its pulling out 8°. Revving it up in the driveway with no load on it, it'll pull 1-2°. I read something about it could be from exhaust noise. What's the solution? Read about the lt4/lt1 knock modules. Are those something thats an option in an 02 2500hd? Just looking for ideas
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Old May 4, 2017 | 10:42 PM
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Moving to Tuning section...
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Old May 5, 2017 | 01:54 PM
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do a pull on a couple fresh plugs and check those plugs to make sure its not real knock

then check the knock sensor harness. wiggle and watch the KR

if thats not fixing it, only then should you begin messing with the knock sensitivity settings
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