Ford Powerstroke Diesel Forum - Reply to Topic
6.7 Motor Problems (2011-2016) 6.7 Motor Problems

Thread: Another Fuel Pressure question Reply to Thread
Title:
Message:
Trackback:
Send Trackbacks to (Separate multiple URLs with spaces) :
Post Icons
You may choose an icon for your message from the following list:
 

Register Now



In order to be able to post messages on the Ford Powerstroke Diesel Forum forums, you must first register.
Please enter your desired user name, your email address and other required details in the form below.

User Name:
Password
Please enter a password for your user account. Note that passwords are case-sensitive.

Password:


Confirm Password:
Email Address
Please enter a valid email address for yourself.

Email Address:
OR

Log-in










  Additional Options
Miscellaneous Options

  Topic Review (Newest First)
08-30-2019 08:07 AM
danmanswag Haven't followed up, been slammed...especially this week with this hurricane!

So I removed and inspected everything. Put filters back on securely. I let it prime doing the whole "key on for 30 seconds thing" countless times. I have not had a light on for almost 2 weeks now. Truck seems fine. I'm going to assume I had air in their and was causing the pressure to drop and the light turn on.

Thanks again everybody for their help with this!

/ side note - most gas stations are out of gas or have massive line down here. It's nice to roll into a gas station and its empty because they have no gas, ONLY DIESEL LOL. Filled up my tank this morning without waiting while all the suckers are scrambling and waiting in 1 hour lines
08-16-2019 12:26 PM
Old King Coal Donít remember off the top of my head but hereís a video.

08-16-2019 11:17 AM
danmanswag Just an update...don't want to ask for help and then just leave ya'll after helping me out.

Haven't had time to get dirty and check out the filters, but I will this weekend. Do you know what specific tools I need? (specific size socket wrench?)

I've been letting the it pump before starting my truck and my light has only turned on 1 or 2 times so far this week since I've gotten the truck back. That would lead me to believe that it's definitely air like you mentioned.
08-14-2019 06:07 AM
HeavyAssault @joebuck and @jman37 have you covered and have awesome advice as well. Check the connections on the filters to be sure.



As long as the Low Pressure warning is gone just pay attention to the pump noise. It may come and go. We do want it to stay away of course. If one day it's gone, another day it's there, then goes away. My experiences say that's a upper or lower connection issue that is letting in air. Just keep it in mind.

I almost always get in cycle the key to On, fasten the seat belt, lower the window, and listen. Since the pump will only run for 30secs I give it 15 or so.....lots of noise....cycle the key again once the pump shuts down. No noise....start the motor.


BTW you are running what is most commonly referred to as a SOTF (Shift On The Fly) 5 position switch. Changing the position while driving can be accomplished with whatever setting you prefer. My advice: Find a happy spot and leave it alone.
08-14-2019 05:55 AM
jman37 If you find that one or both of your filter housings are loose in some way, I wouldn't take my truck back to the "highly recommended" shop again, if they couldn't discover either one was loose.
08-14-2019 05:44 AM
danmanswag
Quote:
Originally Posted by joebuck View Post
Yes you are losing fuel out of your system as it sits which means thereís a air leak somewhere like stated before check connections in upper fuel filter(remove and reinstall making sure they snap on good) then check the lower filter to make sure itís tight and the seal isnít damaged or rolled over.
10-4

Thanks
08-14-2019 05:43 AM
danmanswag Here is my "5 stage" with computer hook up for those of you that were wondering . . .

08-14-2019 05:42 AM
joebuck
Quote:
Originally Posted by danmanswag View Post
Was on my phone so wasn't too clear...

Cycled key to on and let it run till it stopped (30 seconds)...did this at least 4x and didnt hear anything.

Went to the gym and when I got there I did it again...this time it ran for a long time (I should've timed it, but felt like 2 min).


Let's fast forward to this morning....before leaving to work I go through this again.

Key to on position - 30 seconds of it running and then it stopped. I did this 5x and each time it ran for 28 seconds exactly. I had to eventually stop because I needed to leave to work.

The fact that this is happening...does that mean I have air in the system? Like you mentioned, possibly the filter connections or housing?
Yes you are losing fuel out of your system as it sits which means thereís a air leak somewhere like stated before check connections in upper fuel filter(remove and reinstall making sure they snap on good) then check the lower filter to make sure itís tight and the seal isnít damaged or rolled over.
08-14-2019 05:38 AM
danmanswag
Quote:
Originally Posted by HeavyAssault View Post
Do you mean you cycled the key to On, let it run till it stopped (after 30 seconds), then cycled the key off, then cycled to ON at least 4x.....for a total of two minutes of run time??


The lower fuel pump will only run for 30 seconds at a time when cycled to ON.



After all that if you still hear noise, I'd suggest checking the filter connections and housing.
Was on my phone so wasn't too clear...

Cycled key to on and let it run till it stopped (30 seconds)...did this at least 4x and didnt hear anything.

Went to the gym and when I got there I did it again...this time it ran for a long time (I should've timed it, but felt like 2 min).


Let's fast forward to this morning....before leaving to work I go through this again.

Key to on position - 30 seconds of it running and then it stopped. I did this 5x and each time it ran for 28 seconds exactly. I had to eventually stop because I needed to leave to work.

The fact that this is happening...does that mean I have air in the system? Like you mentioned, possibly the filter connections or housing?
08-13-2019 03:40 PM
HeavyAssault Do you mean you cycled the key to On, let it run till it stopped (after 30 seconds), then cycled the key off, then cycled to ON at least 4x.....for a total of two minutes of run time??


The lower fuel pump will only run for 30 seconds at a time when cycled to ON.



After all that if you still hear noise, I'd suggest checking the filter connections and housing.
This thread has more than 10 replies. Click here to review the whole thread.

Posting Rules  
You may post new threads
You may post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

 
For the best viewing experience please update your browser to Google Chrome