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Patrick
Patrick MegaDork
3/21/19 7:01 p.m.

Do you have one line going to the rail or two?  I don’t have a 2005 anymore to check.  

dean1484
dean1484 MegaDork
3/21/19 7:01 p.m.

Ok let me go look at mine I am still at the office BRB

 

dean1484
dean1484 MegaDork
3/21/19 7:03 p.m.

Covers are on my motor and I dont have tools let me do a bit of google looking

 

dean1484
dean1484 MegaDork
3/21/19 7:05 p.m.
dean1484
dean1484 MegaDork
3/21/19 7:09 p.m.

Wait is yours a 6.0 duramax or a 6.0 vortech?

TRoglodyte
TRoglodyte UltraDork
3/21/19 7:23 p.m.

So now the truck is warm and will not start. Gauge reads 10 lb of pressure at the fuel rail and won't build pressure. On this pickup truck there is a box in front of the fuel tank that has three lines running to it and I can feel one line pulsing. Guess I got to find out what's in that box.

TRoglodyte
TRoglodyte UltraDork
3/21/19 7:26 p.m.

In reply to dean1484 :

Vortec in  a sierra pickup, gasburner . 

TRoglodyte
TRoglodyte UltraDork
3/21/19 7:31 p.m.

Watched that video, I guess the 6.0 Sierra is a unicorn because the fuel pressure regulator is not there on the engine.

TRoglodyte
TRoglodyte UltraDork
3/22/19 8:26 p.m.

In reply to Patrick :

One line, driver side

Patrick
Patrick MegaDork
3/22/19 8:48 p.m.

Ok.  

This guy is painful to listen to but explains it perfectly 

 

https://m.youtube.com/watch?v=Z1_tD-Uc0HA

TRoglodyte
TRoglodyte UltraDork
3/22/19 9:09 p.m.

In reply to Patrick :

Thanks for that, so it is in the tank and it sounds like I got a faulty unit because tonight I started the truck and it's only running 10 pounds of fuel pressure but the truck still runs?

TRoglodyte
TRoglodyte UltraDork
3/23/19 6:53 a.m.

Fuel pressure is still low this morning is there anything that would keep thepump from building pressure besides it being faulty?

doc_speeder
doc_speeder HalfDork
3/23/19 9:33 a.m.
dean1484 said:

Wait is yours a 6.0 duramax or a 6.0 vortech?

Just an FYI, the Dmax is a 6.6 liter.

Streetwiseguy
Streetwiseguy MegaDork
3/23/19 11:04 a.m.

Here is a couple of options:

First, I would grab my labscope and go to the pump fuse to check for voltage and amp draw with the pump running. Then I would voltage drop the power and ground sides of the wiring to confirm which segment has a problem, if any. Following confirmation of the electrical continuity, I would compare amperage draw to pressure created, and decide whether there is a mechanical problem in the pump, either an internal leak in the module, or an issue in the pump.

Or, I might pay somebody who knows how stuff works.

dean1484
dean1484 MegaDork
3/23/19 11:12 a.m.
doc_speeder said:
dean1484 said:

Wait is yours a 6.0 duramax or a 6.0 vortech?

Just an FYI, the Dmax is a 6.6 liter.

When you google the part there are a lot of listings for a 6l  duramax for that year that obviously has a completely different fpr 

TRoglodyte
TRoglodyte UltraDork
3/23/19 4:45 p.m.

In reply to Streetwiseguy :

If I knew of such a person I would certainly let  that individual fix it.-

TRoglodyte
TRoglodyte UltraDork
3/23/19 5:31 p.m.

In reply to Streetwiseguy :

Could you enlighten me on why an OBD2 port would fail? I have tried two different code readers and it shows nothing

SkinnyG
SkinnyG UltraDork
3/23/19 6:57 p.m.

Doesn't GM's OBDII port share the same fuse as the radio or heater or something?

TRoglodyte
TRoglodyte UltraDork
3/23/19 8:10 p.m.

I was wondering about a blown fuse but everything else seems to work lights, radio Etc.

TRoglodyte
TRoglodyte UltraDork
3/24/19 6:37 p.m.

In reply to SkinnyG :

Found it, you are correct,lighter fuse. Thank you!

TRoglodyte
TRoglodyte UltraDork
3/25/19 7:32 p.m.

What should the amp draw be on a fully loaded pump in static position all injectors fully loaded both rails? On a single return system

Streetwiseguy
Streetwiseguy MegaDork
3/25/19 8:22 p.m.
TRoglodyte said:

What should the amp draw be on a fully loaded pump in static position all injectors fully loaded both rails? On a single return system

Not sure what you mean.  System pressurised, engine not running, zero.  producing 60 psi with the engine running, kinda sixish amps maybeish.  Two isn't enough. 12 is too much, I think.

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