Surging with cruise control

[jdaigle]

I have noticed what appears to be a surging effect everytime I use the cc. I've noticed it from day 1 and have validated this apparent effect by monitoring the boost gauge while driving. The boost needle will fluctuate in a range of 5-10psi will driving with the cc set at 70mph. The truck is completly stock with 7000 miles on the odo. I've done a search on here and really have not found an answer. Is this normal for a diesel... . this is my first diesel. Thanks in advance for the input.



Jason

 

[DWestfall]

Mine does it as well. From day 1.

 

[JCleary]

Mine would do it, but only after I had pressure boxes hooked up to the MAP and Rail sensors.



I unplugged the boxes and it would still surge.



I tried to fix it by using some Permatex dielectric grease on the connectors. I can't believe it, but it fixed the surging, with or without the boxes being connected.



Perhaps the MAP and Rail plugs on your trucks aren't seated just right? Just a thought...

 

[JThiessen]

I'll second what Mr Cleary said. ON mine, it shows up when I have my Xzillaraider plugged in. When it starts surging, just wiggling the MAP and Rail plugs clears it up (sometimes it doesnt take very long for it to come back).

 

[jdaigle]

Thanks for the input guys, I'll take a look at the MAP and Rail sensors to ensure good connection.



Thanks again for taking the time to respond



Jason