Engine Surge - Dodge Cummins Diesel Forum
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post #1 of 10 (permalink) Old 12-18-2008, 07:57 AM Thread Starter
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Engine Surge

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?

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post #2 of 10 (permalink) Old 12-18-2008, 09:23 AM
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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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post #3 of 10 (permalink) Old 12-18-2008, 05:57 PM
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is it increasing in rpm and increasing speed, or is feeling like the transmission is slipping a bit?
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post #4 of 10 (permalink) Old 12-18-2008, 06:21 PM Thread Starter
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Originally Posted by 98andahalf View Post
is it increasing in rpm and increasing speed, or is feeling like the transmission is slipping a bit?
the RPM's increase but I pretty sure not the speed. It sounds more like tranny shifting
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post #5 of 10 (permalink) Old 12-18-2008, 06:26 PM
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this will solve your problem.

https://www.atsdiesel.com/PDF/120505...%2047%20RE.pdf

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post #6 of 10 (permalink) Old 12-19-2008, 11:39 AM
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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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post #7 of 10 (permalink) Old 12-21-2008, 11:30 PM
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Quote:
Originally Posted by jlscjs View Post
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

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post #8 of 10 (permalink) Old 12-21-2008, 11:33 PM
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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.

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post #9 of 10 (permalink) Old 12-22-2008, 05:07 PM
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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.

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post #10 of 10 (permalink) Old 12-22-2008, 07:36 PM
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Quote:
Originally Posted by mahdey View Post
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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