Did you actually change the fuel?

 

Absolutely many times the problem has been going on for a year or so intermittently. The filters I have changed haven't look that bad. But I keep doing it because its required maintenance and I see all the people with injector issues. So yes I changed the filter. Thanks!

 

What does the throttle position do during that time?

 

the data monster has the throttle position at 74.5 during that time

 

So you are sure the ECM is getting reliable input from throttle but you have a drop in line pressure only, associated with the performance issue… this was all prior to and after any truck mods

 

The FPR is the fuel pressure regulator which is mounted on the fuel pump.The FPR is a solenoid which regulates pressure going into the fuel rail. If the FPR is unplugged, there is no regulation of fuel pressure sent to the fuel rail. The FRPS is the Fuel Rail Pressure Senso, determines actual fuel rail pressure of course, and is mounted on the fuel rail. Pressure information from the FRPS is sent to the ECM and the ECM sends signals to the FPR telling it what pressure to allow into the fuel rail based on a host of different pieces of information like temperature, boost, throttle position, etc.

I noticed when I have the reduced power / shifting issue the Fuel Rail Pressure Commanded is 27,500psi however the Fuel Rail Pressure actual is 3,577psi.

So It looks like the ECM is commanding the FPR to regulate to 27.5k but the rail is at 3.577k. The job now is to figure out where the problem is. There is another post recently with very similar symptoms so look for that post and see what information you can develop.

Just my take on it.

 

There was an issue with the FPR connector on some trucks. There's a TSB somewhere on the forums. It would usually throw a code, but I guess it's possible to not put out a code. I purchased the spare connector just in case. Let me see what I can find.

 

Yea, I think you went down the wrong path with the MAP sensor replacement.

Here you go...

https://www.google.com/url?sa=t&sou...ed=2ahUKEwi5kbGno4D3AhVhT98KHbirAMYQFnoECAMQAQ&usg=AOvVaw0wyqzCS_k3VuA4lCwOA2an

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Ok, that didn't work, Google search for
20-NA-197

 

Your P228C code is listed in the document. Based on everything you've described, you more than likely need to replace your FPR connector.

 

Ok, let's try a direct PDF attachment...

 

@timothy.morris17078
Ok, that worked. While I make no guarantees, I think you'll find some answers in the document above.

 

@timothy.morris17078
Ok, that worked. While I make no guarantees, I think you'll find some answers in the document above.

You sir were 100% right. The connected didn't need to be replaced. However I unplugged the connector looked at it a little light cleaning because it looked really good but plugged it back in and the problem is gone!!!!!!!!!!!! Thank you for the assistance! This was a really annoying problem that really was driving me nuts! Thanks again!

 

You're welcome, if it comes back though, you're probably going to have to replace it. It seems to be a common problem. I vaguely remember that the new connector is a slightly different style.
My replacement connector is already sitting in my pile of spare parts...

 

You're welcome, if it comes back though, you're probably going to have to replace it. It seems to be a common problem. I vaguely remember that the new connector is a slightly different style.
My replacement connector is already sitting in my pile of spare parts...

@viper8315 I am having the exact same issues this thread is talking about (watching fuel rail pressure drop from 27k to 3k). Just to confirm before I start tearing into this, Is this the sensor and connector that is directly on the passenger side fuel rail?

 

Same issue I’m having. I hit the throttle and it acts like it lost its balls, and then all of a sudden i feel it kick back on and I take off.

 

Sounds like it’s the same issues. My truck would fall straight on its face. So bad that passengers felt it loose power. The video on Dennys Diesel you tube channel is a great guide.

 

You sir were 100% right. The connected didn't need to be replaced. However I unplugged the connector looked at it a little light cleaning because it looked really good but plugged it back in and the problem is gone!!!!!!!!!!!! Thank you for the assistance! This was a really annoying problem that really was driving me nuts! Thanks again!

You're welcome, if it comes back though, you're probably going to have to replace it. It seems to be a common problem. I vaguely remember that the new connector is a slightly different style. My replacement connector is already sitting in my pile of spare parts...

Do you happen to have part number on that FPR connector?