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Discussion Starter · #1 ·
The truck idle fluctuates from 600 to 1000 rpms at idle. In gear and not. With the chip and without. Full tank and Empty. This a little concerning and dont know what the problem is. Any help is much appreciated.
 

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Dirty injectors?

Fuel filter changed when?

Air filter cleaned or changed when?
 

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Seafoam? I'm interested.
 

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Discussion Starter · #7 ·
I have used Powerservice in the past and i will pick up a container tommarow A.M. as for the Seafoam is it good for Diesel? I've used it in gassers and mowers.
 

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SeaFoam contains a lot of Alcohol and its not recommended by Dodge or Cummins to be used in a diesel engine even though the maker of SeaFoam claims it can be used in diesel. Alcohol is used sometimes to de-gel gelled fuel and then only in something like Power Service 911 that also contains additives for the fuel system.

JMHO
 

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can you actaully tell the truck is idling that much difference or is it just the tach bouncing... (not trying to seem like a smart ) but my tach is doing similar things right now but the truck itself isnt actually idling that way just the tach bouncing I have heard of other guys having the same problem
 

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Mark Ward
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mine used to do that in the past. The tach would jump around.
 

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Discussion Starter · #12 ·
Thanks for the input. The truck actually idles up and down. I was hoping it wasnt anything serious because I use this truck for my business and once I fix something I will jump into it with both feet. Injectors, turbo, etc. Thanks I'll keep you informed on what it turns out to be.
 
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