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98.5-02 PowertrainDiscussion of components that are directly involved in the power production and all that is needed to get and keep the truck moving . Engine , Transmission Ect..NO ADVERTISING .
I have a 02 Cummins, for the past year I can be driving and holding it at around 45-55 when all of of sudden ( but not all the time only frequently) the engine will increase in rpm by about 200-500. Took it to dealer , said they could find nothing wrong on the computer, changed fuel filter, still does the same. I also notice the other day it sounded like my fan speed increased, although since the truck was new on cold days my light would go a little brighter when I first started it. I'm thinking about replacing batteries , (original), but to me that doesn't explain the surge in rpm's any answers?
cant say much for your cruise, but dont bother wasting money on new batteries. The lights will flicker a bit when its cold due to the grid heaters cycling (they draw 195amps!)
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2007 Laramie 3500, 4.5" RevTek, 35x12.5 ProComp MTRs, buckstop front+rear, bullydog TD, BD RFI intake, Lightforce 140s in the bumper, 240HIDs up top
1997 SLT 2500, 5.5" fabtech, 36x13.5 IROKs, 5x12s, s300, 4kgsk, inj pump FUBAR
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2000 2500 QCLB AT 4x4,Fully built Goerend Transmission, Mach 7's, 5" Exhaust, AD 150, ADR/Pulse, Twins, Studs, o-rings. Sold
2006 Dodge Ram QCLB 3500. Efi live etc. 649hp on old setup.
The Following User Says Thank You to mahdey For This Useful Post:
Could be eltrical noise. You could try wrapping aluminum foil around the alternator wire that leads to the battery negative and cover in eltrical tape. I also purchased 2 RF noise yokes from radio shack and put 1 on the pcm harness and 1 on the TPS harness.
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My Ride: 01 2500 Quad cab 4x4 with a DTT Tranny, Crazy Carls S357/S475, Airdog 150 with modified fuel canister, Hot Unlocked Edge Juice w/Attitude, Fluidampr, DT ProFab Drivability Kit with Bilsteins, Sport Converted Headlights, Aviation Lights off the rear axle
I have a 02 Cummins, for the past year I can be driving and holding it at around 45-55 when all of of sudden ( but not all the time only frequently) the engine will increase in rpm by about 200-500. Took it to dealer , said they could find nothing wrong on the computer, changed fuel filter, still does the same. I also notice the other day it sounded like my fan speed increased, although since the truck was new on cold days my light would go a little brighter when I first started it. I'm thinking about replacing batteries , (original), but to me that doesn't explain the surge in rpm's any answers?
i had the surge in rpms as well in my 02. i noticed mine in overdrive driving in low rpms say in the 1400 rpm range. To me it did not seem the tranny was slipping because to fix the surge i needed to cruise at a higher rpm and no surge or slip existed. The time i noticed this was the same time low sulfur diesel came to the market. I was told to start using an additive formulated for ultra low sulfur. I started using stanadyne performance formula and since ive been using it, i have not had any problems with surges at all. (started using it last december or last january) All i can say is try an additive if you have not. It seemed to fix my problem, The fuel that is availiable to us now was not the fuel our 5.9 were designed to burn, good luck to you
Mine will up and down in rpm's when cruse is set about 60 to 70. Dont know if im having the same problem or not.
__________________ 06 Mega Cab 4x4 Laramie Goerend, Dipricol's, aFe Stage II, aFe Bladerunner, HTT SS 62/71/13 with SS Manifold, Flo Pro, EFI'ed by DJ's Diesel SOLD: 06 BIG HORN QC 4x4AutoMeter's, lil tranny work, aFe Stage II, Magnaflow, and EFI'ed by DJ's Diesel SOLD: 06 BIG HORN QC 4x4 Built Trans and maxed out stock motor.
SOLD: 06 BIG HORN QC 4x4 Cummins 6 Speed SB w/SB DD
SOLD: 04 QCSB SLT 4x4 Cummins 6 Speed w/SB DD
SOLD: 02 ExCab 4x4 Cummins auto stock
If you ever find out an answer, PM me please because I'm having the same issue for a while now, and mine also doesn't do it all the time. Seems like in 3-4 gear running around 30-40 mph is where i'll notice it. I tried and apps reset which didn't solve it, I run stanadyne too. Only codes coming up in the odometer is a 0500 i believe and the companion code (1693 ? ) Been a while since I looked so can't remember if that's exactly what they are.
__________________ 2002 QCSB, 245hp HO 6spd,Edge Juice / Attitude, 4" MBRP turbo back,BHAF, Silencer ring MIA,Fuel Boss pump, 3cyl-6cyl high idle enabled,Prowelder high idle fooler,HBS 2" leveling kit,DSS stabilizer,Borgeson Box and Steering Shaft
am i bloody talking to myself THIS WILL SOLVE YOUR PROBLEM. It solved mine and my friends, and his along with his girlfriends.
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2000 2500 QCLB AT 4x4,Fully built Goerend Transmission, Mach 7's, 5" Exhaust, AD 150, ADR/Pulse, Twins, Studs, o-rings. Sold
2006 Dodge Ram QCLB 3500. Efi live etc. 649hp on old setup.
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