Surging going on with my 6.0 (help)

[Mikes Dyno tuning]

I just picked my 2003 6.0 from our closest Ford dealer about two weeks ago. They installed a new ficum and fixed a few other problems in the wiring. Anyway my truck now has a surging going on when acceleratiing, mostly when it is cold. It has to be completly warm or it will surge. It just about goes away when it is warm. Does it with or without the tune in. I noticed it real bad on the bypass running 75 mph and about 2200 rpm. It never did it before, not blaming on shop, just woundering if something else is starting as soon as i picked up and paid the big bill..lol

[rizzlebizzle]

Early build motor, check the ICP sensor. I had the exact same problem. It's in the back and is a total pain to get at. Feel for oil on the wiring harness/around the sensor. Should throw a code so check for that before you tear into it if you have access to a reader.

[Mikes Dyno tuning]

Thanks i replaced that pain in the but just before i put it in the shop. So dont think that is it but thanks again for the help.

[Granny]

Did you replace your ICP harness when you replaced your ICP? If not that could be your issue.

[Mikes Dyno tuning]

No i didnt replace the harness. And it did have alot of oil on it. I did unplug the Egr and it seemed to run a little beter. When the truck is at low rpm or with a little load on it seems to buck more.

[Mikes Dyno tuning]

By the way Grannie your pic looks familar! I was one wore out dude after that dyno show! But me and the crue had a good time. Hope all is well. Good to here from you.