Stuttering - P062A

[MCas86]

I searched the site and didn't find anyone else having the same experience as myself.
When I clear the code and drive, around 2k RPM and generally 55 MPH, the truck starts to heavily stutter and appears to attempt to go between ECO and not. If I let it settle back into ECO, it will run alright and won't throw any code. I can punch it and get passed the stuttering and then it will finally throw a code. P062A which when I checked my OBD2 is obviously what's been mentioned multiple times on this forum, "Fuel Pump 'A' Control Circuit Range/Performance problem".

This is where my experience differs from what I understand from what I've read from other posts here.

Once I get the code to throw, ECO mode no longer engages whatsoever. Even more odd is that the stuttering stops completely too. Unless I reset the code and allow ECO to engage.

Any thoughts?
Thanks!

 

[RamDiver]

I searched the site and didn't find anyone else having the same experience as myself.
When I clear the code and drive, around 2k RPM and generally 55 MPH, the truck starts to heavily stutter and appears to attempt to go between ECO and not. If I let it settle back into ECO, it will run alright and won't throw any code. I can punch it and get passed the stuttering and then it will finally throw a code. P062A which when I checked my OBD2 is obviously what's been mentioned multiple times on this forum, "Fuel Pump 'A' Control Circuit Range/Performance problem".

This is where my experience differs from what I understand from what I've read from other posts here.

Once I get the code to throw, ECO mode no longer engages whatsoever. Even more odd is that the stuttering stops completely too. Unless I reset the code and allow ECO to engage.

Any thoughts?
Thanks!

Check the video posted in this thread.

https://www.ramforum.com/threads/p062a-code-troubleshooting-previously-p018c.218967/

.

 

[RKramkowski]

Mine was the referenced post above. Mine also sometimes will stutter and stall when idling, in addition to stumbling at highway speeds. As with yours, if I punch it or pump the pedal, it will be running fine again. The code has always cleared itself in a day or so, only to return a few days later after extensive driving. Most of the time it runs fine even with the code as discussed in the video. It happened again yesterday. I have already replaced the fuel pressure sensor (the new one I got is supposedly a redesign and used a different connector so I had to splice in a new connector), fuel pump/filter, and the fuel pressure control module. But the P062a code still comes back intermittently. As per the video, the numbers I'm getting are desired rail pressure- 400KPA, actual rail pressure - 400KPa (+_ 3KPA), pump voltage = 2.7 at idle, 2.9 at 2000 rpm, and the duty cycle is 45.8% with an occasional drop to 0 if I punch it. This is with no P062a code since it cleared itself this morning again. So the main difference on mine is that the voltage is almost double what is discussed in the video. I'm not sure what to do next. I'm going to try driving around with my monitor connected to see if I can actually "catch it in the act".

Update: I was just driving for about two hours - a mix of highway and around-town. Here’s what I saw from the data logging. Battery voltage stayed around 14v +_ .2v. There was one momentary drop to 13v that didn’t correlate to anything. For the most part, fuel rail pressure stayed around 450KPa but had occasional periods of 700KPa. Those 700KPa periods seemed to coincide with a fuel pump voltage of 4.7v whereas it was normally around 3.1v. But the code has not come back yet. Does this point to anything abnormal?

 

[MCas86]

I took mine in and they replaced the fuel pump and the module. Been running fine since.

Then a few days ago, it threw another code. hahaha. This time it was about my MDS but I don't care enough about ECO to fix it. Code was P3497 - Cylinder Deactivation System Bank 2. Haven't had any issues so I think my MDS just died. I havent looked too much into it.

All temps and psi look good while driving.