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Old 05-21-2019, 04:33 PM   #1
Almost There
 
Join Date: Jun 2018
Location: Oakland, CA
Posts: 74
Year: 2006
Coachwork: Collins
Chassis: Chevrolet
Engine: 6.6 LLY Duramax
Rated Cap: 15
Rough idle and check engine light too!

First startup in a bit made for excitement draino. Any recommended mechanics in the Oakland Ca area?
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Old 05-21-2019, 05:54 PM   #2
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Join Date: Dec 2016
Location: Weeki Wachee, FL
Posts: 2,675
Year: 1997
Coachwork: Bluebird
Chassis: TC2000 FE
Engine: Cummins 5.9
Rated Cap: 72
Your bus should have a typical GM ECU with OBD2. Any autozone can pull the codes from the computer for free, I'd start there.
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Old 05-21-2019, 07:07 PM   #3
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Join Date: May 2014
Location: West Ohio
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Year: 1984
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Yeah what he said. If it's got a duramax, you should be able to pull engine codes with any generic obd2 reader.
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Old 05-21-2019, 09:20 PM   #4
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Join Date: Jun 2018
Location: Oakland, CA
Posts: 74
Year: 2006
Coachwork: Collins
Chassis: Chevrolet
Engine: 6.6 LLY Duramax
Rated Cap: 15
Right! P0191

Funky idle went away after warming up. The battery was low when starting and perhaps that was the root cause. The internet has someone with a similar story.

Trying to start the truck with a dead battery will set this dtc also. As will connecting the battery with the key on.

From this site https://www.pirate4x4.com/forum/tow-...r-2k-help.html
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Old 05-22-2019, 12:01 AM   #5
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Join Date: Sep 2017
Location: Damascus, OR
Posts: 606
Year: 2004
Chassis: International
Engine: T444e w/ 2000 Allison Trans
Rated Cap: 35
I have an LLY duramax in my 2005 Silverado. I use this forum whenever I need to (which thankfully has not been in a very long time) I even got enough courage to change my headgaskets through the info on that site. it took 2 weeks every day after work but several years later. no problems.

https://www.duramaxforum.com/forum/
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