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Duramax 6600 Discussion Forum for the Duramax 6600 Diesel Engine, including the LB7, LLY, LBZ & LMM engine specific topics.

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  #211  
Old 11-18-2015, 06:12 PM
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Mark Rinker Mark Rinker is offline
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Great news. Interesting to see the # of hits on this thread, after almost seven years...never seen any problem resist a 'root cause resolution' quite like the "P00087 Low Fuel Rail Pressure" gremlin...
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2011 Chevrolet Tahoe 5.3L daily driver
  • Previous owner of two 1994 6.5L K3500s, '01, '02, and '05 6.6L K2500s, '04 C4500, '06 K3500 dually, '06 K3500 SRW, '09 K3500HD SRW, '05 Denali
  • Total GM diesel miles to date : ~950K
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  #212  
Old 11-20-2015, 07:15 AM
Kennedy Kennedy is online now
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Root cause: excessive return flow from the injectors due to wear.

Cheap fix: Kennedy Custom ECM programming

Expensive fix: 8 new injectors
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Kennedy Diesel-owner
More than just a salesman-I use and test the products that I sell on a daily basis!
Superflow Lie Detector in house
2002 Chev K2500HD D/A CC Long LT 11.77@ 124mph at 7700# fuel only-e.t. needs help
2005 Chev K3500SRW D/A CC Long LT(SOLD)
2007 Chev K2500 Classic EC Short LT (Sold)
2012 GMC K3500SRW D/A CC Long LTZ Happy Birthday to me! Built 1 working day after my birthday and delivered 7 days later.
2016 GMC K3500SRW D/A CC short LTZ

Custom tuning in house using EFI Live tuning software!
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  #213  
Old 11-20-2015, 03:25 PM
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a5150nut a5150nut is offline
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Quote:
Originally Posted by Kennedy View Post
Root cause: excessive return flow from the injectors due to wear.

Cheap fix: Kennedy Custom ECM programming

Expensive fix: 8 new injectors
Or do both and be good for a lot longer!
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  #214  
Old 11-24-2015, 12:38 PM
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Mark Rinker Mark Rinker is offline
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Quote:
Originally Posted by Kennedy View Post
Root cause: excessive return flow from the injectors due to wear.

Cheap fix: Kennedy Custom ECM programming

Expensive fix: 8 new injectors
Where does "Lift Pump" fall into that continuum?

JK with all respect due, anyone that takes the time to re-read this nearly seven year long thread would deduce that it certainly WAS a long and winding road finally leading to 'root cause'. I'm glad that you stuck by your customers and finally found a programmatic solution for this problem! Congrats.

Glad its solved. Hope GM has/will incorporate better ECM programming in the future to allow for a wider range of injector return rates as the injectors wear over time.
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2011 Chevrolet Tahoe 5.3L daily driver
  • Previous owner of two 1994 6.5L K3500s, '01, '02, and '05 6.6L K2500s, '04 C4500, '06 K3500 dually, '06 K3500 SRW, '09 K3500HD SRW, '05 Denali
  • Total GM diesel miles to date : ~950K
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  #215  
Old 11-24-2015, 01:05 PM
Kennedy Kennedy is online now
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Quote:
Originally Posted by Mark Rinker View Post
Where does "Lift Pump" fall into that continuum?

Mandatory for any Duramax in my opinion and experience.
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Kennedy Diesel-owner
More than just a salesman-I use and test the products that I sell on a daily basis!
Superflow Lie Detector in house
2002 Chev K2500HD D/A CC Long LT 11.77@ 124mph at 7700# fuel only-e.t. needs help
2005 Chev K3500SRW D/A CC Long LT(SOLD)
2007 Chev K2500 Classic EC Short LT (Sold)
2012 GMC K3500SRW D/A CC Long LTZ Happy Birthday to me! Built 1 working day after my birthday and delivered 7 days later.
2016 GMC K3500SRW D/A CC short LTZ

Custom tuning in house using EFI Live tuning software!
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  #216  
Old 11-24-2015, 02:28 PM
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Mark Rinker Mark Rinker is offline
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Quote:
Originally Posted by Kennedy View Post
Mandatory for any Duramax in my opinion and experience.
Your opinion is welcomed, your experience is deep and wide. Please explain
  • Why GM has sold millions of units since 2001 without a lift pump;
  • What is the accelerated outcome of not having a lift pump - i.e. premature CP3 pump failure, premature injector failure, global warming, etc;
  • Why it took seven years to arrive at a programmatic solution for the P0087 error code, if adding a lift pump was not the solution.

Curious, as I've been since 2009 when I first started this thread.
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2011 Chevrolet Tahoe 5.3L daily driver
  • Previous owner of two 1994 6.5L K3500s, '01, '02, and '05 6.6L K2500s, '04 C4500, '06 K3500 dually, '06 K3500 SRW, '09 K3500HD SRW, '05 Denali
  • Total GM diesel miles to date : ~950K

Last edited by Mark Rinker; 11-24-2015 at 02:42 PM.
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  #217  
Old 11-25-2015, 07:37 AM
Kennedy Kennedy is online now
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http://www.kennedydiesel.com/docs/Du...ift%20pump.pdf
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Kennedy Diesel-owner
More than just a salesman-I use and test the products that I sell on a daily basis!
Superflow Lie Detector in house
2002 Chev K2500HD D/A CC Long LT 11.77@ 124mph at 7700# fuel only-e.t. needs help
2005 Chev K3500SRW D/A CC Long LT(SOLD)
2007 Chev K2500 Classic EC Short LT (Sold)
2012 GMC K3500SRW D/A CC Long LTZ Happy Birthday to me! Built 1 working day after my birthday and delivered 7 days later.
2016 GMC K3500SRW D/A CC short LTZ

Custom tuning in house using EFI Live tuning software!
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  #218  
Old 05-11-2017, 03:33 PM
Sirgrinalot81 Sirgrinalot81 is offline
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Post P0087

New to the diesel life and having some issues. I have an 2009 lmm 95000 miles keeps throwing p0087 and is going through fuel filters like 1 a month. Totally stock. Also have a lot of water in the fuel. Located in Kansas. I just ran it almost empty put seafoam in it and filled it up. Think I got a bad tank of fuel from caseys. Before it was throwing p0088 instead of the p0087. Any help is appreciated thanks
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  #219  
Old 05-12-2017, 07:16 AM
Kennedy Kennedy is online now
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Quote:
Originally Posted by Sirgrinalot81 View Post
New to the diesel life and having some issues. I have an 2009 lmm 95000 miles keeps throwing p0087 and is going through fuel filters like 1 a month. Totally stock. Also have a lot of water in the fuel. Located in Kansas. I just ran it almost empty put seafoam in it and filled it up. Think I got a bad tank of fuel from caseys. Before it was throwing p0088 instead of the p0087. Any help is appreciated thanks
What I would recommend is a small bottle of FPPF Fuel Power to dry things up in your tank and then find a better fuel vendor or who spiked your tank.

From there my Tech Tips have the answers. On a daily basis I am "fixing" this with my pumps and tuning and will add that I am now hearing from a lot of "second round" guys who did the injectors and repeated shortly after or even immediately. The solution is still the same, still highly effective, and to me it just makes sense to do something that improves the system rather than just replacing parts with same.

P.S. I would NOT get hung up on water separators as many seem to be doing. You are one of the very few that has ever found any water in their systems
__________________
Kennedy Diesel-owner
More than just a salesman-I use and test the products that I sell on a daily basis!
Superflow Lie Detector in house
2002 Chev K2500HD D/A CC Long LT 11.77@ 124mph at 7700# fuel only-e.t. needs help
2005 Chev K3500SRW D/A CC Long LT(SOLD)
2007 Chev K2500 Classic EC Short LT (Sold)
2012 GMC K3500SRW D/A CC Long LTZ Happy Birthday to me! Built 1 working day after my birthday and delivered 7 days later.
2016 GMC K3500SRW D/A CC short LTZ

Custom tuning in house using EFI Live tuning software!

Last edited by Kennedy; 05-12-2017 at 07:26 AM.
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  #220  
Old 09-15-2017, 12:20 PM
CoyleJR CoyleJR is online now
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Default P0087 & hot fuel

I just returned home from four months on the road pulling our 38' 5th wheel. The truck and 5th wheel have a combined weight of 23,800 lbs and the temperature was often well over 100 degrees. My truck is a 2006 LBZ with 240,000 miles and this is the first time it has shown P0087 code. I found that if my fuel tank level was below half a tank, the temperature was over 100 and the truck was working hard pulling a steep grade it will throw P0087 code. I was able to repeat this problem code several times and fix it by opening the valve on my second fuel tank and adding fuel to the primary truck fuel tank. For 240k miles I have always kept the truck tank full by gravity feed from the secondary tank. This trip was the first time I let it get below half a tank of fuel. A full fuel tank must cool the hot fuel returning from the motor and that cool fuel keeps the truck from showing the P0087 code. I realize that there can be several causes for a P0087 code to show up but on my truck high fuel temperature seems to be the cause.

Additionally, I keep the small fuel cooler radiator in front of the fuel tank very clean and I am now considering installing a second fuel cooler on the right side of the truck.
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*2006 Chevy, 3500, 4X4, DRW, (LBZ) D/A, CC, LT, 245K Miles, 19.5" Wheels, Mag Hytec Transmission Pan and Differential Cover, SS Grill Guard, Racor 2 micron aux fuel filter, 100 Gallon Aux Fuel Tank, using Edge Evolution, Predator Diablosport, Kennedy ECM tune, Fitch Fuel Catalyst.

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Last edited by CoyleJR; 09-15-2017 at 04:25 PM.
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