What's the cure for cruise control surge?

[Charlie.Smith]

I just installed DDP2's on my '96.

With the DDP2's the throttle is *very* sensitive. Just a little bit of pedal gets a puff of black smoke and a surge forward.

When using cruise control at a steady light throttle, like 65 MPH on a flat road, i have a constant surge like I'm tapping the fuel pedal and letting off about once a second.

Is there an adjustment to make the cruise control less sensitive? I can't see anything looking at the shop manual.

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Charlie Smith - Columbus, Ohio
'97 2500 4x4 auto, Suncoast TC/VB, #5 16.5*, Arrowcraft DRW, Aerotanks D60, KDP
'96 3500 2x4 auto, Goerend TC/VB, #5 16* DDP2 355hp/970tq, D60 tank, KDP

[99cummingetsome]

i would also like to know an answer to this. my truck threw the abs/brake lights due to the sensor on the rear differential being bad. i have yet to swap it out. i thought the cruise was messing up because my speedometer would drop in mph and my truck was trying to catch up with the speed but now that i think about it, it didnt happen until after i installed my 130hp injectors.

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99 3/4 Ton SB QC 4x4- Quadzilla Adrenaline w/ Pulse, 130hp sticks, Fass Pump, Valair Feramic Single Disk, 4 inch exhaust to 6 inch tip. Dying for a dual disk and more air!!

[plig_kid]

I have heard about this from a lot of people. I run 155hp sticks and dont get it at all.?

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01 ext. cab, shrt bed, 6spd w/ BD short shift kit, edge juice w/hot, bd 155 sticks, sb con fe clutch, 5 inch Diamond Eye, BD aux lift pump, Smarty, II silver 62, Haisley Machine O-ring head gasket, Arp Studs, all done by me!

[1970 300 SEL]

i was asking a similar but not quite same question on another board.

i would like to test the effects of a restrictor in the vacuum line. maybe something like a welding tip my logic says this might reduce cruise sensitivity?

[redfishunter83]

I also have the same problem after I installed my hot vp44 and 155hp injectors. I get the surging when i engage the cruise control. I would also like to know if there is anything to adjust to keep this from continuing to happen.

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99' 24v 4x4 longbed, De-Badged, BHAF, Homemade Aluminum Intake, 7in black miter stack, Triple Dash Pod and Steering Column Pod filled with Pro Comp Ultra-Lite Guages, Sliencer Ring Removal, Dave's Diesel "Hot" VP44, 155hp XXX Pulse Sticks, 150/150 FASS Pump

[Dual K20s]

Originally Posted by 1970 300 SEL

i was asking a similar but not quite same question on another board.

i would like to test the effects of a restrictor in the vacuum line. maybe something like a welding tip my logic says this might reduce cruise sensitivity?

Bingo restrict the line and it will soften it up

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98 Dodge 2500 Motor: 12 valve, BD exhaust brake, 4" turbo back exhaust, BHAF, KDP tabbed, 4K GSK, O-ringed head, .020 over HG, Modified AFC, DDP Stage 3 injectors, DDP DVs, 17.5* timing, 16cm^2 ex. housing Drivetrain: 5-speed 4x4 w/ SB clutch (13" OFE 450Hp)

[jcarl735]

my truck does the same after my ddp3s

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3.55s, 305/70/16s, MBRP 4''Turbo Back, #100 Full Forward, AFE ProDry Stage 1, DDP3s, Boost Elbow, AFC !MIA Silencer Ring !MIA, 55 PSI, DiPricol Boost/Pyro/Trans, KDP Tabbed, Built 47re, Farmboys Full Cut DVs, 3k GSK, ATS Quikspool

[Charlie.Smith]

I have sort of cured the problem, using a Charlie Systems AntiSurge Valve.

This custom AntiSurge Valve is an item constructed from 2" of rubber vacuum hose and a 1/2" piece of brass tubing from a ball point pen. You crimp the middle of the brass tube almost closed and stuff it into the 2" piece of vacuum hose. This should be such that when you suck on it, it will pass air, but not much.

Then you cut the plastic vacuum tube going to the cruise control and stuff both ends of it into the 2" vacuum hose. This is adjustable, since you can recrimp and uncrimp the brass tube until you get it just right.

This slows down the reaction of the throttle actuation diaphram so it settles down and doesn't keep surging.

Watch for our announcement of more exciting new products! :

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Charlie Smith - Columbus, Ohio
'97 2500 4x4 auto, Suncoast TC/VB, #5 16.5*, Arrowcraft DRW, Aerotanks D60, KDP
'96 3500 2x4 auto, Goerend TC/VB, #5 16* DDP2 355hp/970tq, D60 tank, KDP

[1970 300 SEL]

so it worked eh? i was thinking another option comes from the aquarium section of walmart. the plastic air control valves should be about the right size

should also work for towing with cruise. when im towing and hit a grade the throttle goes pretty much to the floor instantly to maintain speed. id much rather have a more gradual transition and maybe lose a few mph up hill and maybe gain a few down hill.