Jump to content

04 E7 problem


Recommended Posts

Been driving an 04 RD690S for a while now and have an issue. Truck has approximately 273K miles on E 7 385hp engine. The problem is that when you are building speed either loaded or empty at around 13 to 14 rpms the engine decelerates and it takes forever to get to 1600, then it gains power and goes on. It only does this in top 3 gears(T308 tranny) but it also does this loaded on hard pulls, pulls down to 1600 then looses power sometimes down to 1300 rpm. Local Mack dealer hasn't a clue as to the cause, hoping someone out there has had the same issue or an idea as to what will fix it. Thought it might have been accelerator pedal and change that helped somewhat but problem came back. Last week had to replace fuel pump with no luck. Any body got any ideas.

  • Like 1
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...