Chevy/GMC Duramax 01-04 LB7 Discussion of Chevy and GMC Trucks with LB7 Duramax Turbo Diesel Engines

LB7 tear down

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Old May 21, 2014 | 10:25 PM
  #241  
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its locked and wash throwing this up on his Tech 2 in a big red box BOOTLOADER REJECTE sooo looks like i need a ECM so that being said any ideas i was thinking about saving up and getting one from duramaxtunner loaded with a DSP5 for stock trans and EGR turned off any imput fellas
 
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Old May 21, 2014 | 10:56 PM
  #242  
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Originally Posted by Walker.B
he said "it being a Cali emissions truck the glow plugs work differently and light longer and stay lighted till the engine reaches a set temp then the shut off its to help burn cleaner and reduce unburned fuel when cold or during warm up of the engine and it is possible that with 3 failed its putting the trucking into default mode and not firing the injectors we can not move on with the diagnostics till we rule out the failed glow plugs"

i highlighted what i think is B.S
you are correct. it is a bunch of baloney.

the most the glow plugs will be on after the engine starts is 60 seconds and that is at -40 degrees. at 25 to 90 degrees it is 30 seconds.

i have had mine disconnected for almost 4 years with no starting issues. lowest i have had to start it in was 14 degrees and it started no problem.
 
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Old May 21, 2014 | 11:50 PM
  #243  
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I too was wondering about that ... I usually never wait either .. too damn busy for waiting ..LOL
 
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Old May 21, 2014 | 11:51 PM
  #244  
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Originally Posted by Walker.B
looks like the ECM is trashed this is my VIN 1@@#$%%^^&@WEZT43_(* it wont reflash or rest at all when he tried to do anything it said failed to receive signal from ECM
Originally Posted by Walker.B
its locked and wash throwing this up on his Tech 2 in a big red box BOOTLOADER REJECT sooo looks like i need a ECM so that being said any ideas i was thinking about saving up and getting one from duramaxtunner loaded with a DSP5 for stock trans and EGR turned off any imput fellas
it is possible that you may be able to recover it by bench flashing it with EFI Live.

Bricked my ECM in my LB7? - Chevy and GMC Duramax Diesel Forum

it may have also been flashed before and locked with EFI Live.

https://forum.efilive.com/archive/in...p/t-20892.html

there is also a posibility of finding an LB7 at a wrecker and buying the ECM from then and then flashing your VIN into it.
 
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Old May 22, 2014 | 03:06 PM
  #245  
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Sounds like a real fun time ......NOT !!!!
 
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Old May 23, 2014 | 09:17 PM
  #246  
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no one around has efi live tools so I can't get one and flash it or bench flash mine any ideas
 
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Old May 23, 2014 | 10:45 PM
  #247  
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Bummer ... well, go get it for your truck ... would be worth having ... expencive if your broke , but worth having if you can afford it ...LOL
 
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Old May 24, 2014 | 04:37 PM
  #248  
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man I really wish I knew someone with with a v2 or something so all id have to do is bench flash it or buy a efi license and tune it
 
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Old May 24, 2014 | 11:36 PM
  #249  
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have you gotten a new ECM yet ? I would snag one out of a salvage yard, flash it to your truck and get it home before the mechanic start racking up a massive bill on ya ...just my $.02 .... fast and easier too
 
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Old May 25, 2014 | 01:22 PM
  #250  
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I can't flash it no one around here can and all junkyards in 250 miles don't have a lb7
 
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