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Duramax Third Generation: 2006-2007.5 (LBZ & LLY) Discuss the third generation (2006-2007.5 LBZ & LLY) of the 6.6L Duramax diesel engine & associated components. 2006 LLY engine discussion also belongs in this forum due to the similarities of the 2006 LBZ and the 2006 LLY. Engine related discussion ONLY.

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Old 04-21-2015, 11:58 PM   #1 (permalink)
IGO1320
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New cure for P0087!

My truck runs great except for that pesky code that occurs when the fuel rail temperature gets over 160f. I installed a PPE dual fueler, truck still runs great will hopefully tow something heavy in the next week or so thru some mountains! For the code to occur temp must be up and heavily loaded, truck unloaded will not code. I am at 434k miles now.
In theory the additional fuel pump will supply enough volume to keep rail pressure at commanded pressure during heavy loads. If this works it is cheaper than new/reman injectors. Since the load on the CP3 is cut in half I should not have to replace it either......"in theory"

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2006 2500HD CCSB 4X4 RED LBZ
Spray-In Bed Liner, Air Bags
Custom Reese 20K slider FWH/Gooseneck hitch
265/75/16 Michelin LTX AT2's on PYO's
Duramax.com tow tune, PPE Dual Fueler (P0087 cure)
Kitty on a "warm shelf", K+N Drop-in filter
Amsoil in all places, Amsoil BMK-27 Bypass
KYB shocks (stock sucked)
Autometer Boost/Pyro gauges/Edge CTS
EGR blocker and (Kennedy) finger stick
Transgo Jr. installed at 77325 miles
Kennedy Pump Rub plate installed, 98060 miles
Kennedy lift pump, reserve tank with transfer pump
2011 LML torque converter.
14.558 @ 91.03 Hypertech now?????
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Old 04-22-2015, 12:13 AM   #2 (permalink)
testdrive
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The Suburban Club Member

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DieselPlace.com February 2014 Truck Of The Month

Proud owner of a 2003 Chevrolet Duramax Suburban K2500
powered by a 2007 LBZ Duramax Diesel
6SP Allison with Transgo JR mod
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Old 04-23-2015, 12:07 AM   #3 (permalink)
oldred95
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I take it the loss of fuel pressure has progressed to the point the altered tuning will no longer take care of it? Interesting idea. This goes back to that raise the dam lower the river thing.
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1995 C1500 - out of commission
1999 NBS Z71
2003 LB7 - KD lift pump, 4 inch Diamond Eye QT exhaust, Cat 2 micron filter, PPE boost valve, ported turbo inlet, LML manifold, EFI live tuned, 20x9 Fuel Octanes wrapped in 305/55-20 Cooper Zeon LTZs
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Old 04-23-2015, 09:41 AM   #4 (permalink)
IGO1320
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Yeah the programming helped for around another 150k miles. I am back to conventional programming also, forgot to add that change. Changed program when I decided to add the dual fueler.
__________________
2006 2500HD CCSB 4X4 RED LBZ
Spray-In Bed Liner, Air Bags
Custom Reese 20K slider FWH/Gooseneck hitch
265/75/16 Michelin LTX AT2's on PYO's
Duramax.com tow tune, PPE Dual Fueler (P0087 cure)
Kitty on a "warm shelf", K+N Drop-in filter
Amsoil in all places, Amsoil BMK-27 Bypass
KYB shocks (stock sucked)
Autometer Boost/Pyro gauges/Edge CTS
EGR blocker and (Kennedy) finger stick
Transgo Jr. installed at 77325 miles
Kennedy Pump Rub plate installed, 98060 miles
Kennedy lift pump, reserve tank with transfer pump
2011 LML torque converter.
14.558 @ 91.03 Hypertech now?????
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Old 04-26-2015, 03:33 PM   #5 (permalink)
20052500HD8100
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any luck?
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2006 Chevy 2500HD 4x4
Crew Cab Short Box, Black on black, Loaded
Stock LBZ -- Allison 6spd -- 3.73 gears
PPE Stage IV Trans & Goerend Converter
5" Magnaflow Stainless Turbo-back Exhaust
Kennedy Single Deluxe Lift Pump
Auto Meter Gauges: Boost - Pyro - Rail Pressure
Self-Tuned with HPT

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Old 04-26-2015, 09:26 PM   #6 (permalink)
cat tec
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Also curious
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07 LBZ cc sb 4x4
-4" MBRP stainless turbo back
-Max Energy
-Air filter mod
-Air horns
-Transgo jr.
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-ISSPRO gauges
-Air bags/leveler valve
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Old 04-26-2015, 09:35 PM   #7 (permalink)
IGO1320
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I am in Kentucky tonight, towed a 28' horse trailer. Not enough weight to tell yet. Fuel rail temperatures never got over 131f, it needs to get over160f to cause the problem. Will pick up a larger trailer tomorrow in Goshen IN. Hopefully I will have to take it somewhere mountainous. Have noticed fuel pressure appears more stable.
__________________
2006 2500HD CCSB 4X4 RED LBZ
Spray-In Bed Liner, Air Bags
Custom Reese 20K slider FWH/Gooseneck hitch
265/75/16 Michelin LTX AT2's on PYO's
Duramax.com tow tune, PPE Dual Fueler (P0087 cure)
Kitty on a "warm shelf", K+N Drop-in filter
Amsoil in all places, Amsoil BMK-27 Bypass
KYB shocks (stock sucked)
Autometer Boost/Pyro gauges/Edge CTS
EGR blocker and (Kennedy) finger stick
Transgo Jr. installed at 77325 miles
Kennedy Pump Rub plate installed, 98060 miles
Kennedy lift pump, reserve tank with transfer pump
2011 LML torque converter.
14.558 @ 91.03 Hypertech now?????

Last edited by IGO1320; 04-26-2015 at 09:38 PM.
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Old 04-26-2015, 10:15 PM   #8 (permalink)
SouthernNites
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I just had that problem with my 06 LBZ. It would only set the code when I was pulling a heavy load and trans temp went above 195 degrees. No heavy load and no high trans temp equalled no code. Also, when the code set, my truck would shut down within 5 seconds after the code appeared. My temp fix was to leave a code scanner hooked to the ODB II and clear the code as soon as it apeared. The truck would run fine if I kept the code cleared, but the code would constantly reappear.

My problem was bad fuel from the get go, but the problem was trying to get a good diagnosis on what exactly was damaged from the fuel. All the mechanics, including the dealer, wanted to just replaced the whole fuel system to the tune of about $14,000. I tried a few cheap simple cures like having the fuel tank and lines cleaned, then had the FRP valve replaced all to no avail. Ended up getting the injectors replaced and the problem has yet to resurface. The injectors had contamination in them from water in fuel.

Hope this helps you guys, I know I was ready to sell the truck and call it quits myself after fighting the dreaded P0087 code for 4 months.

Last edited by SouthernNites; 04-26-2015 at 10:20 PM.
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Old 04-27-2015, 06:30 PM   #9 (permalink)
IGO1320
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Injectors wear internally passing fuel back to the tank this causes the fuel rail pressure to drop below the commanded pressure that triggers the code. The transmission temp rises because the load has increased. Injectors wearing is normal with mileage, I am hoping that increasing the volume of fuel will allow the rail pressure to remain in spec and prevent P0087 from occurring..
__________________
2006 2500HD CCSB 4X4 RED LBZ
Spray-In Bed Liner, Air Bags
Custom Reese 20K slider FWH/Gooseneck hitch
265/75/16 Michelin LTX AT2's on PYO's
Duramax.com tow tune, PPE Dual Fueler (P0087 cure)
Kitty on a "warm shelf", K+N Drop-in filter
Amsoil in all places, Amsoil BMK-27 Bypass
KYB shocks (stock sucked)
Autometer Boost/Pyro gauges/Edge CTS
EGR blocker and (Kennedy) finger stick
Transgo Jr. installed at 77325 miles
Kennedy Pump Rub plate installed, 98060 miles
Kennedy lift pump, reserve tank with transfer pump
2011 LML torque converter.
14.558 @ 91.03 Hypertech now?????
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Old 04-27-2015, 06:34 PM   #10 (permalink)
IGO1320
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I picked up a 40' toy hauler 19,000gvw 15,640lbs as shipped. Taking it to Louisiana from Indiana so that should be a decent test.

__________________
2006 2500HD CCSB 4X4 RED LBZ
Spray-In Bed Liner, Air Bags
Custom Reese 20K slider FWH/Gooseneck hitch
265/75/16 Michelin LTX AT2's on PYO's
Duramax.com tow tune, PPE Dual Fueler (P0087 cure)
Kitty on a "warm shelf", K+N Drop-in filter
Amsoil in all places, Amsoil BMK-27 Bypass
KYB shocks (stock sucked)
Autometer Boost/Pyro gauges/Edge CTS
EGR blocker and (Kennedy) finger stick
Transgo Jr. installed at 77325 miles
Kennedy Pump Rub plate installed, 98060 miles
Kennedy lift pump, reserve tank with transfer pump
2011 LML torque converter.
14.558 @ 91.03 Hypertech now?????
Online   Reply With Quote Quick reply to this message
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