I just got an 03 6.0 and a few days ago it developed a rough idle, it takes a little longer to crank and idles fine for 30 seconds to a minute then the rough idle kicks in also I noticed when I drive it the low rpm range is a little choppy and when I come to a stop it goes a little below idle then resumes the rough idle issue. I had it die on the road a day prior to this after it lost complete power at a red light, it started to idle low so I tried to counteract with a little throttle and with the throttle all the way it did nothing, a few minutes it died on the road and took a few minutes to start back up I did a set of filters and it hasn't done it again but I still have the rough idle, I checked the icp sensor and wiring no oil so I cleaned it up a bit and it runs a little smoother but want to know if anyone might have any other suggestions.
Hi af11. My 03 6.0 did the same thing.... the first time it was the icp sensor. Second time it was the HPOP. The third time it did it it was the FICM. ICP sensor doesn't have to leak to be bad. Just my 2 cents
Which reminds me I do have an oil leak I haven't tracked down yet it's on the back of the motor up top I just need to get some time to look at it well. Any idea what it might be, I've got a lot of experience with the 7.3 but they don't have issues like the 6.0 does