Idle surges

[559powerstroke]

I have a 04 6.0 with 94xxx I just put new ficm in 3 months ago due to really bad surges. Ran great after installed just yesterday it started all over again not as bad as first time. Is there anything eles it could e or is computer going again?

[dhanna6powerstroke]

Where is your ICP sensor located? In the passenger valve cover or under the turbo? If it's an early 04 engine then it should be under the turbo. If so, unplug it and inspect connector for oil contamination. I'll bet that's what you find. Replace sensor and pigtail if oil soaked and will most likely fix your issue.

[559powerstroke]

It's located on the front side of the valve cover. Un plugged looked clean blew out put some diolectric grease

[dhanna6powerstroke]

Could still be the ICP sensor, you just won't have oil when they're mounted at that location. If it starts doing it again, unplug sensor and see if it goes away. If so, replace sensor.

[559powerstroke]

Ill have to check it out Tomarrow thank you!

[559powerstroke]

Is it best to have the truck off before unplugging or is it ok when it's running