Today my truck's idle began fluctuating a little. You can hear and feel it more than you can see it on the tach. It can't be much, but you can see the needle moving just a little.

Has anyone else experienced this? If so what did it turn out to be? Just hoping it's not a symptom of something to come.

There are no dash indicators illuminated.

Thanks in advance.

 

This could be a number of things.

If this were mine I would check for codes. Absent this or don't have a code reader I think I would at least run some white bottle power service through there. I has a cetane booster plus injector cleaner.

I am thinking injectors though.