Hey yall i gota 99 powerstroke with 119k had the truck for a week running fine but i drove to work this morning and put her in park it was running a lil rough it has been holding a strong idle untill now and now its acting up not to bad but its bouncing from 700 to 650 and once in awhile it spuders to 500 and then hesitates before regaining a good idle its completly stock with no mods any input yall got would be greatly appreciated trucks in washington state and the weathers been a lil cold but not bad

 

Where abouts in Wa state?

Try unplugging your ICP sensor and letting her idle. See if there is oil on the connector...

 

Make sure your UVC harness on both sides is plugged in. Make sure you dont have any water in your fuel.

 

thanks guys i found the part of the harness that came lose im in the kitsap area