Here is a picture of the other location they wanted me to check

:

 

The first pic shows where your mechanic would have installed the Exergy valve into the disaster kit fitting after removing it from the new CP4 pump. This is a tight fit even using lubricant and if pulled into place while tightening the bolts could have damaged one of the orings on the new Exergy valve. The second pic shows the bottom of the disaster kit fitting and the arrow is where that fitting seals into the CP4 Pump in place of the fuel metering valve and also a good place to look for oring damage. The fitting on the left side of that pic is where you either use the original orings off the now discarded fuel supply line that was cut to install the kit or new orings supplied with the disaster kit. If using the kit supplied orings and they aren't color coded to the original fuel supply line orings it's possible to install incorrectly as they are different size. I attached my kit install pdf as it shows color pics of the orings mentioned above. I used a S&S Diesel kit so oring colors may be different but have found reading install instructions from a different viewpoint is sometimes helpful. One last thing is to make sure they torqued all the bolts on kit and valve as these parts are critical to be properly tightened. Hope some of this makes sense and helps out a little.

 

Helps a bunch, thanks. I have the piece of line, it still has a green and yellow o-ring in it which leads me to believe the DPK came with o-rings. I was ‘helping’ with dissembling and reinstallation and do know he torqued the bolt. I must have not been paying attention when the DPK was installed as I don’t remember him taking the Exergy module out of the pump. I might have been off BSing with someone. I do remember him torquing the bolt on the DPK though as that bolt is longer than the one on the stock set up and he was looking for the bolt.

 

i ran into the same thing with a 2011. fitting a 2015+ pump requires tuning. i have hptuners and can write a tune or a fix for it but unless ur close by i cant write it to ur truck.

 

Are you saying your truck acted the same way or wouldn't run correctly when you first installed the 15+ pump?

 

correct it throwed all kinds of lights. i used the bypass also. but the bigger pump flows more fuel and pressure so u ahve to tell the computer whats going on to compensate for it.
i think u should be able to get any diesel tuner to fix it for you if u already have a sct or something.

 

Wow. Very interesting. Thanks...

 

the p0088 is fuel rail/system pressure too high code

 

Hey Chuck, you need to consider this. Maybe ask Exergy their thoughts as well. If this pump produces higher pressure, that would explain that code. Check it out...

Chuck did bring this up in a previous comment:

Together with the disaster prevention kit Exergy bought, their testing and the data FORScan produced it looks like they were able to identify 3 possibilities. As I mentioned in my original post I noticed that the "the voltage does slowly creep up to 2.31 before the problem occurs" the Exergy graphed the data. The graph shows how the voltage increases up until the truck goes into reduced power mode. Bottom line is that there is a leak someplace. It is completely counterintuitive to me how a leak can cause high fuel pressure.

 

is that a pid he monitored? maybe the voltage was from the pressure sender and high voltage is higher pressure?? not sure there.

 

Chuck, like gump said, the truck will need some calibrating. Just learned this yesterday after talking with a buddy in the tuning world. I was under the impression no tuning was needed, but I ran your situation by him. He mentioned that for a 15+ pump
to work properly on a stock 11-14, it would need some tweaking.

 

Interesting, I haven't read on either the Exergy site or the Alligator Performance site where tuning is needed for the 11 - 14s. I will shoot Exergy a message and I did speak to someone from Alligator when I bought the thing making it clear that it was for a 2013. Gump, which PID are you looking for? I can easily reproduce the problem grabbing any PID needed. The PID Exergy used to determine that there was a leak was MPROP which looks like Fuel Value Control Valve Current Measured (Amper). I also sent them the Fuel Rail Pressure (Volts). The data I sent them is attached to post 1. I'm in Woodbury CT, not sure I'm close to anyone. I do have a license for FORScan and what I used to grab the PID info so if it's a straight forward tweak can it be made with FORScan?

 

Ill grab that from post one.

no forscan wont do anything for the pcm. Which is where this is stored at. Youll have to get a handheld tuner and a custom tune in order to correct it. Or use hptuners.

 

Well Chuck, look on the bright side...at least you don't have to disassemble to look for a bad oring.

 

IMO, if this is true, the vendor has done you a huge disservice by not informing you of the requirement for a tune to make this work. I'd be pissed...what starts as a desire to make truck more reliable now turns into a tuning issue...you should have been told ahead of time of this requirement.