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Hi I have a 2003 that when going at slow speeds or sitting at a light the idle is running just fine then the next second it surges and almost feels like you were rear ended. It did this randomly a couple times then today it surged at a light and shut off but it started up just fine but now has a check engine light on. I have noticed the surging happens more frequently when it is hot out. Any ideas would be greatly appreciated. I am fairly new to being a diesel owner. Oh I have also noticed that the fuel mileage has dropped considerably.
Thank you very much! Looks like I am working on the truck this Saturday instead of fishing.... Oh and seeing that the part is $150 or so looks like Bud is out the window. Natty light here I come! Haha