Jump to content

Mack MP8 runs until it drains the filters


Recommended Posts

I have a 2011 Mack CXU613 with a MP8. If you fill the filters up and use a small amount of ether, it will start and run for approximately a minute. Then is shakes and bucks like it’s running out of fuel. Remove the filters and they’re half empty. The fuel filters, and the pump have been replaced. I’ve taken the lines off and blew through them. Have no active codes relating to fuel pressure or even system. I’m at a loss here. 

Link to comment
Share on other sites

4 minutes ago, nrichey83 said:

I have a 2011 Mack CXU613 with a MP8. If you fill the filters up and use a small amount of ether, it will start and run for approximately a minute. Then is shakes and bucks like it’s running out of fuel. Remove the filters and they’re half empty. The fuel filters, and the pump have been replaced. I’ve taken the lines off and blew through them. Have no active codes relating to fuel pressure or even system. I’m at a loss here. 

Also, after the engine shuts down, you can open the drain on the fuel/water separator and air comes out for just a second and then fuel starts coming out. Meant to add that 

Link to comment
Share on other sites

unfortunately You may have injector cup problems ! it would help if you post how this issue developed if it has been getting worse over time! its likly cups if it started all of a sudden could be a fuel primer pump has failed!

Link to comment
Share on other sites

Join the conversation

You can post now and register later. If you have an account, sign in now to post with your account.

Guest
Reply to this topic...

×   Pasted as rich text.   Paste as plain text instead

  Only 75 emoji are allowed.

×   Your link has been automatically embedded.   Display as a link instead

×   Your previous content has been restored.   Clear editor

×   You cannot paste images directly. Upload or insert images from URL.

 Share

  • Recently Browsing   0 members

    • No registered users viewing this page.
×
×
  • Create New...