How JustAnswer Works:
  • Ask an Expert
    Experts are full of valuable knowledge and are ready to help with any question. Credentials confirmed by a Fortune 500 verification firm.
  • Get a Professional Answer
    Via email, text message, or notification as you wait on our site.
    Ask follow up questions if you need to.
  • 100% Satisfaction Guarantee
    Rate the answer you receive.
Ask Chris Your Own Question
Chris
Chris, Shop Foreman
Category: Dodge
Satisfied Customers: 13041
Experience:  Dodge/Cummins and Chrysler Certified Master Tech
12365498
Type Your Dodge Question Here...
Chris is online now
A new question is answered every 9 seconds

2012 dodge ram 6.7 diesel is losing injection pressure and

Customer Question

2012 dodge ram 6.7 diesel is losing injection pressure and dying under hard acceleration. The injectors, tunes, lift pump, and injection pump have all been replaced. Not sure what is going on here
Submitted: 6 months ago.
Category: Dodge
Expert:  Chris replied 6 months ago.

Hello and welcome to just answer. Is a low rail pressure code being set?

Chris

Customer: replied 6 months ago.
I have no codes
Expert:  Chris replied 6 months ago.

Hmmmm, that is strange. If your rail pressure is dropping off, then a P code should be setting. What is the actual rail pressure vs the desired rail pressure when the problem occurs?

Chris

Customer: replied 6 months ago.
Desired is 22000 or so and it drops to 145
Expert:  Chris replied 6 months ago.

Lift pump volume is good? Are you getting at least 46 ml within 10 seconds?

Chris

Customer: replied 6 months ago.
Then it will die and it will have to turn over for almost a minute sometimes before it will start again
Customer: replied 6 months ago.
I am going to check that now and I will let you know.
Expert:  Chris replied 6 months ago.

Ok

Customer: replied 6 months ago.
I figured at that rate it should fill a gallon in 1 minute and 22 seconds. I couldn't even get half a gallon of fuel in that time frame out of the air dog pump
Expert:  Chris replied 6 months ago.

Ok, there is your problem. Is the original in tank pump still installed?

Chris

Customer: replied 6 months ago.
No the original pump has been removed from the vehicle
Expert:  Chris replied 6 months ago.

Ok good. Then that Fass pump has failed or you hsve a plugged up screen in the tank. Once you get that fuel volume up, the problem should be solved.

I hope that this information has been helpful, and if so would you kindly take a moment and rate my service today? I will still be able to help you out even after you rate me.

Thank you!

Chris

Customer: replied 6 months ago.
Not a screen I pulled the pick up tube out of the tank and put in a bucket of fuel and it flows just as bad as when it is in the tank. This is the second air dog pump that has been defective from the company. They are sending another one but I will never buy another one in the future. The sad part is between the 2 new pumps the truck doesn't even have 8 miles on it since the first one was installed
Expert:  Chris replied 6 months ago.

Interesting. If you continue to have this issue, double check that you are getting a full 12 volts and a good ground.

Chris

Customer: replied 6 months ago.
I checked that also and power and ground is good. Just bad luck I suppose
Expert:  Chris replied 6 months ago.

Ok, just wanted to be sure. Hope the new pump is better and will last a while! !

Chris

Customer: replied 6 months ago.
You said 47 ml in ten seconds. I was under the impression the vehicle should produce 500 ml in ten seconds?
Expert:  Chris replied 6 months ago.

I think that is correct, but I will double check that when I get to work.

Chris

Expert:  Chris replied 6 months ago.

I stand corrected. It is 500 ml in 10 seconds.

Chris

Expert:  Chris replied 6 months ago.

Did you get the new lift pump installed yet?

Chris

Expert:  Chris replied 6 months ago.

Hello? Are you still here?

Chris