Chevy and GMC Duramax Diesel Forum banner

1 - 12 of 12 Posts

·
Registered
Joined
·
221 Posts
Discussion Starter #1
SO my buddy just installed EFI on his 2002 Dura he just put one stage on at first and it ran amazing then he ordered a switch so he could run the 5 stages and when he installed that his truck will run for a bit and then just shut completley off has anyone had this problem or does anyone know how to fix it??! Any suggestions would be great thanks!!:confused:
 

·
Registered
Joined
·
221 Posts
Discussion Starter #3
A Local diesel buddy its only his 2nd truck and he is busy today so hasnt had a chance to look at it just figured id check on here to maybe help him out!
 

·
Registered
Joined
·
221 Posts
Discussion Starter #4
Anyone?? :(
 

·
Registered
Joined
·
2,073 Posts
Ummmm, not really sure did he switch through his DSP tunes? if so did the switch work? are the pins in the right position on the ECM harness?
 

·
Registered
Joined
·
221 Posts
Discussion Starter #7
Thanks man i could definatley use some help!! Tryin to figure this out is hard when you dont know much about EFI!
 

·
Registered
Joined
·
1,609 Posts
Is he positive that it is pinned right?? When a DSP5 is installed and tunes loaded, a V2 handheld can be used to read whether or not voltage is actually changing when the witch changes positions. If it is definately pinned right and switch is working, something is up with the way he has the tunes layered. Remeber, if it is pinned wrong and he has a successful download, it will still operate off of the base tune.
 

·
Registered
Joined
·
2,480 Posts
Something has to be happening inside one of the tunes
 

·
Registered
Joined
·
1,095 Posts
how long does it run? if its for about a second or so and then shuts off id say its security related. try leaving the key on for a while and come back and try it again. did this happen right after he flashed it and put the switch in?
 

·
Registered
Joined
·
3,642 Posts
you need to do a FULL FLASH when doing DSP5 on the LB7's.

Even after you did the initial OS flash....to make changes to tunes 3, 4, 5 have effect, you need to full flash every time.

ben
 
1 - 12 of 12 Posts
Top