Surging w/ cruise control

[Powder Extreme]

Does anybody else have a problem with their truck surging while using cruise control? Mine at a steady 75mph will surge between 6 and 16 lbs of boost, you can feel the pedal constantly going up and down. DC has no idea.

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2001 Quad Cab Dually, ETH, SLT Plus, 275 injectors, Banks Power Pack.

 

[illflem]

That's why I'm working on a Constant throttle cruise control,see in Products/Acc forum. Having a 10 psi boost swing on a flat,smooth road with no headwind is excessive though,it's probably your PCM,if you are under warranty have it replaced. Throttle surging,even when unnoticeable will lower your mpgs considerably.

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95' 25004X4,AT,Driftwood,Banks Stinger,Warn fender flairs and running boards(work truck)
95 3500,5 speed 3:54,BD E-brake,Driftwood,Banks&Psycotty,34,000 GCVW apple and tractor hauler(works harder truck)

 

[Grady]

These two links may not directly address your surging. It seems the usual cruise control surging problems are due to an erratic vaccuum flow from the vacuum pump, a bad cruise servo, or the cruise reflash is needed.

https://www.turbodieselregister.com/ubb//Forum4/HTML/002355.html
https://www.turbodieselregister.com/ubb//Forum4/HTML/003248.html