Chevy and GMC Duramax Diesel Forum - View Single Post - Rough Idle (with video)
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post #3 of (permalink) Old 12-10-2019, 08:12 AM Thread Starter
gear jammer
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Join Date: Nov 2012
Location: Yacolt, WA
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I had to add a wire to the ecm to get the high idle functional, I had an LB7 and had to do the same thing with it. It will bump up to 1200 RPM, and it doesn't seem to have the surge sound at that RPM, so it could just be that it doesn't like 850.

I have 4" straight pipe exhaust, with the high idle set higher you can hear lots of turbo.

05 LLY ZF6 Moonshine Tuned 230K South Bend Dual Disk
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