Jump to content
  • Welcome To Mopar1973Man.Com

    We can see that your guest and been lurking about. When you register on the Mopar1973Man.Com site you'll be able to interact with all the other members. This is the most friendliest Cummins forum you'll ever join. Take the time right now and  REGISTER  on the Mopar1973Man.Com this will open up many more options and functions on the website. Everyone is very friendly and helpful just ask questions and everyone will help you out the best they can. 

Sign in to follow this  
cumminspowered01

01 surging on highway??

Recommended Posts

My 01 surges with the cruise on at any highway speed. If I take the cruise off and hold my foot in one spot and it will hold speed and boost. With the cruise on it is back and forth between 11-17 psi. Any suggestions?

Share this post


Link to post
Share on other sites

Is your's run off the vacuum or ECM? If it's vacuum controlled you might have a leak. The actuator is under the driver side battery. Check all the vacuum lines to see if you have any leaks. Let us know if it is ECM controlled..

Share this post


Link to post
Share on other sites

Is your's run off the vacuum or ECM? If it's vacuum controlled you might have a leak. The actuator is under the driver side battery. Check all the vacuum lines to see if you have any leaks. Let us know if it is ECM controlled..

Yeah it could look like this... http://forum.mopar1973man.com/attachment.php?attachmentid=836 After some plastic welding. http://forum.mopar1973man.com/attachment.php?attachmentid=837 Cover removed... http://forum.mopar1973man.com/attachment.php?attachmentid=841 Valve Solenoids removed... http://forum.mopar1973man.com/attachment.php?attachmentid=840 http://forum.mopar1973man.com/attachment.php?attachmentid=838

Share this post


Link to post
Share on other sites

Is your's run off the vacuum or ECM? If it's vacuum controlled you might have a leak. The actuator is under the driver side battery. Check all the vacuum lines to see if you have any leaks. Let us know if it is ECM controlled..

i agree..under the driver side battery there is what is called the cruise control servo..it has a hard 5/32 or 7/32 ...dont remember what size line...running from there up to a vacuum header that is hanging out of the hood to cowl seal..right above the valve cover.that line can crack...come out of the little 90 degree elbow at the servo.hope this helps you out.
  • Like 2

Share this post


Link to post
Share on other sites

Oh... Another trick... The plastic tubing... Remove the full length of it from end to end... Now flex the tubing and roll the flex down the length looking for splits. Don't kink it or fold it... just put a heavy bend in it and if the tube is split it will show up quick! On my Mom's 96 it split the tube but would randomily work and not. Well after flexing the tubing the split showed up so I replace the piece and the problem solved.

  • Like 1

Share this post


Link to post
Share on other sites

Bigger injectors bigger turbos and a dying VP44 are all possible cruise surging causes also. My 02 started surging as the very first sign of the VP44 dying a few days later it got the hard start when warm issue then a few days later I lost the throttle. Chrysler bought that one for me though as it was still under warranty at 40k.

Share this post


Link to post
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.

Sign in to follow this  

  • Donation Goals

    Mopar1973Man Medical Bills

    If you want to donate to Michael Nelson medical bills. Any fund donated here will be directed toward the medical bills and getting them paid. 


    10%
    $50.00 of $500.00 Donate Now


×
×
  • Create New...