What did I mess up? - Chevy and GMC Duramax Diesel Forum
06-07 LBZ & LLY Duramax Powertrain Discussion of components that are directly involved in the power production and all that is needed to get and keep the truck moving . Engine , Transmission, Etc.

 
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post #1 of 3 (permalink) Old 10-12-2019, 11:07 PM Thread Starter
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What did I mess up?

Changed the thermostats on my 2006 LBZ. Pretty simple job of removing serpentine belt, then AC compressor, plus unplugging a few electrical connectors. Popped in the new thermostats, put everything back together and now the idle is way off and high, doesn't shift when it used to, seems like it is out of timing or some other weird electrical issue?

What did I mess up?
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post #2 of 3 (permalink) Old 10-13-2019, 07:13 AM
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Originally Posted by SurfMotoDMAX View Post
Changed the thermostats on my 2006 LBZ. Pretty simple job of removing serpentine belt, then AC compressor, plus unplugging a few electrical connectors. Popped in the new thermostats, put everything back together and now the idle is way off and high, doesn't shift when it used to, seems like it is out of timing or some other weird electrical issue?

What did I mess up?
Jeez you didn’t have to do all that . To do mine I just took the resonator off and disconnected the wiring harness . It sounds like you have a vacuum leak, but there is I vacuum in the diesel . I wonder if it’s something related to the hydro boost

2006 Chevy Silverado 4x4 2500hd LBZ - 139k miles

Last edited by Jberger93; 10-13-2019 at 07:49 AM.
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post #3 of 3 (permalink) Old 10-13-2019, 07:25 AM
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Diesels do not have Vacuum to the air fuel system if I am correct. So I would be wondering what is not firmly seated for the plugs you might have remove in process.

Re-trace all what you did tighten and inspect for loose connections wires and hoses, you will find it I think.

2008 Silverado LTZ
Tuned with EFI Live
6 inch lift by Fabtech
35 inch BFG K02 All terrain Tires

Last edited by mkayler; 10-13-2019 at 07:27 AM.
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