I have a 2015 Longhorn EcoDiesel Truck(I love this truck BTW) the the CP4 Pump failed on me due to contamination in the fuel. In lieu of taking it to the Dealer and paying $7500 for them to replace the entire fuel system by charging 2x for parts and having incompetent mechanics do the work I thought I would take a stab at it first.
The fuel tank was almost full when I came of the express way about 4 weeks ago and as soon as I got to the light it stalled. It did not turn on again. I had it towed to my house where I first checked the fuel filter which was replaced about 12-15K ago (148K miles currently). The filter was in good condition and the fuel was clean. I then moved to the fuel soleniod/regulator. Upon removing it I quickly I found crud and pump fragments, so I knew the CP4 had died. Prior to this, I had recently taken the truck into the Dealer for the Emissions recall because my regen system was broken. There they supposedly reprogrammed my ECU with the new EPA friendly software and replaced all bad Emission parts. They also told me that I had low Fuel Rail pressure and possible contamination in the fuel system. I left the dealer and not even 600 miles later I started to get the Regen Error again. The dealer now would not look at because they claimed that the contaminated fuel system is causing the Regen/Emissions system to fail. Well that made zero sense to me and I drove away.
I bought a new CP4 and installed it. I separated the pump return and the fuel rail return from each other because we know that the rail is contaminated with metal shrapnel and did not want to ruin a good pump. I checked the fuel pressure coming from the tank and it looks solid. I tried to start the engine and it would do nothing. Not even cough. Its as if the injectors are not firing because the Computer is not allowing it or perhaps that module is bad. I then cracked open all the injectors one at a time to make sure I am getting fuel and sure enough plenty of fuel is getting to each injector. I must of gone through the start cycle now like 20 times. I had to replace a week battery and all. Still I have witness Zero firing. I then purchase an ODM reader BlueDriver and read my codes. I first erased my codes and tried to start to engine to re generate them. I am now seeing P026D which is Fuel Injection Quantity Higher(gets to 4500psi) than expected and P0191 Fuel Pressure Sensor Circuit Range/Peformance Bank(says to replace sensor) . It also shows P2002 which is the fuel filter needs changing and I am going to do that ASAP, but there is good enough flow still.
I understand that I might have damaged injectors and some clogging in the fuel rail and I was expecting the engine to start and run really rough. However, as mentioned previously there are ZERO signs of combustion.
So my question is if there is too much fuel coming why would that prevent it from starting?
Is the Fuel Injection control module bad? how can I trouble shoot that? What controls the injectors from opening to allow fuel into the Cylinder?
Thanks in advance,
Ozzy
The fuel tank was almost full when I came of the express way about 4 weeks ago and as soon as I got to the light it stalled. It did not turn on again. I had it towed to my house where I first checked the fuel filter which was replaced about 12-15K ago (148K miles currently). The filter was in good condition and the fuel was clean. I then moved to the fuel soleniod/regulator. Upon removing it I quickly I found crud and pump fragments, so I knew the CP4 had died. Prior to this, I had recently taken the truck into the Dealer for the Emissions recall because my regen system was broken. There they supposedly reprogrammed my ECU with the new EPA friendly software and replaced all bad Emission parts. They also told me that I had low Fuel Rail pressure and possible contamination in the fuel system. I left the dealer and not even 600 miles later I started to get the Regen Error again. The dealer now would not look at because they claimed that the contaminated fuel system is causing the Regen/Emissions system to fail. Well that made zero sense to me and I drove away.
I bought a new CP4 and installed it. I separated the pump return and the fuel rail return from each other because we know that the rail is contaminated with metal shrapnel and did not want to ruin a good pump. I checked the fuel pressure coming from the tank and it looks solid. I tried to start the engine and it would do nothing. Not even cough. Its as if the injectors are not firing because the Computer is not allowing it or perhaps that module is bad. I then cracked open all the injectors one at a time to make sure I am getting fuel and sure enough plenty of fuel is getting to each injector. I must of gone through the start cycle now like 20 times. I had to replace a week battery and all. Still I have witness Zero firing. I then purchase an ODM reader BlueDriver and read my codes. I first erased my codes and tried to start to engine to re generate them. I am now seeing P026D which is Fuel Injection Quantity Higher(gets to 4500psi) than expected and P0191 Fuel Pressure Sensor Circuit Range/Peformance Bank(says to replace sensor) . It also shows P2002 which is the fuel filter needs changing and I am going to do that ASAP, but there is good enough flow still.
I understand that I might have damaged injectors and some clogging in the fuel rail and I was expecting the engine to start and run really rough. However, as mentioned previously there are ZERO signs of combustion.
So my question is if there is too much fuel coming why would that prevent it from starting?
Is the Fuel Injection control module bad? how can I trouble shoot that? What controls the injectors from opening to allow fuel into the Cylinder?
Thanks in advance,
Ozzy
