Test subject stopped in today and I verified which tune it was that worked. Planning to do lift pumps soon, possibly next week. I also have him cleaning fuel cooler. It looks pretty grungy at a glance.
Test subject stopped in today and I verified which tune it was that worked. Planning to do lift pumps soon, possibly next week. I also have him cleaning fuel cooler. It looks pretty grungy at a glance.
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!
I recently did a performance tune for LMM and added the same correction. Customer made trip and tells me that he easily would have tripped 12 or more times on this type of run. He thought that he was free and clear, but managed to trip it once just out of the blue. Considering the added demand/load of the tuning this isn't bad. We are taking a wait and see approach and will consider more tweaking if the issue persists.
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!
Unless that guy is hauling in the southwest, my guess is he will have more issues next summer when higher temps return. Ambient temps which contribute to high fuel temps are a big part of this issue.
I am finishing up a 3000 mile trip today, with a heavy wide boat and through terrain that would have tripped the P00087 many times last summer. So far only two codes set, and that was running hard uphill with a low tank of fuel. The only difference? About 30-40 degrees less ambient fall temps.
This issue is best solved via programming tweaks, but it is clearly a combination of all that has been discussed, including:
If I'm still hauling boats next summer I will buy your finished product, if it can be warranted to solve yproblem. However, my goal is to be in Seattle driving a 2012 ZL1 Camaro by then, although I may be driving my daughters Jetta if I can't find anyone to buy my biz...we'll see which happens first!
- High mile or high fuel volume injectors (i.e. always towing)
- Heavy loaded towing, usually compounded by hills
- High fuel temps, caused by excessive return rates, low fuel level in tank, poor fuel cooling or flow, etc.
Mark @ www.MREBoatTransport.com
Last edited by Mark Rinker; 09-28-2012 at 05:26.
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
This trip was made during conditions that would have normally caused the limp numerous times. I'm a bit late in reporting.
Customer is well aware that he's likely delaying the inevitable and that there are NO GUARANTEES and I make this clear in my Tech Tip, but for now if it helps minimize the instances plus increasing the capabilities if in limp mode it's a win-win for most.
Again no guarantees, BUT a willingness to adjust and tweak to work around the issue as needed.
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!
I have been curious if diesel fuel is formulated for use in a high pressure application like the Dmax. Most of the fuel the pump picks up is by-passed back to the tank so fuel is constantly recirculating and besides picking up heat from the engine it also adds heat from being under pressure. I wonder if a fan located to blow on the fuel heat exchanger would help. Also the fuel constantly be re-circulated and the ultra low sulphur content of the fuel might be reducing lubricating properties of the fuel to the point that it harms the injectors.