Yes, they have duplicated it on more than one occasion!! Long story short, I bought this X in March as a factory buy-back (got a hell of a deal! but have to deal with this BS for now) Before I bought it they had replaced the EBP sensor, CPS and I might be missing something. Since I have owned it, it has been reflashed to the very latest one and the FICM harness replaced about a month ago. To my knowledge it has never had the ICP replaced. I did mention this to the service manager today and asked him to look into that.

How many miles have you put on it since it solved your problem?

 

I've put about 4,000 miles since (54,300 total) with no surging/bucking with the new ICP- According to the Tech (6.0 certified) a faulty ICP can be somewhat difficult to diagnose due to the established operating parameters in the diagnostic troubleshooting program- In other words, it doesn't raise a big Red Flag (for example) like a bad EGR does.

Interesting item of note: When the faulty ICP was causing the engine to surge badly, the AM radio had a lot of static...Even when listening to stations with a strong signal. The new ICP eliminated the static

 

Listen to this! I just got off the phone with my service advisor. He told me that the Ford diesel engineer drove my truck today but it did not duplicate! This did not surprise me as it did not do it to me on the way down (40 miles) to the dealership! Anyway, this is where it gets good, he tells me he really dug into it and ran some serious tests and came up with 2 codes I think he said P0404 and P0405 both being wire shorting problems in the engine wiring harness. Not just the FICM harness but the entire engine harness. Said instead of spending hours if not days trying to pipoint the problem in the harness, the engineer gave them permission to replace the ENTIRE engine wiring harness! Plus, a new FICM harness as there is a more updated one since the one they put on a month ago! Said they will also be putting in a new EGR valve. Did not say anything about ICP though?

I can't imagine the tab that will be generated after this visit to the shop. Glad I am not pickin' it up though!

 

ga,
Out of curiosity, do you get very good AM radio reception? (I added some text to my post #17)

 

Just got our truck back this PM. Dealer found had code P0404. Found EGR stuck and EBP sensor bias (whatever that means) high readings. They replaced EBP sensor and EGR valve.
Had recall 05S34 for FICM harness inspected and installed harness covers.

Hope this helps someone out here whith this type of problem.

 

got results from dealership on the bucking and black smoke problem.

EGR stuck open (replaced) EBP sensor bias high readings (replaced)
computer had error code P0404 reprogramed PCM-TCM-FICM to current levels.

In addition had a recall 05S34 on the engine wiring harness.

Well got it back and it runs great.

 

Did they do the whole engine harness or just the FICM harness?

Oh, and Utahtom, my AM reception on the radio does not seem too bad and I listen to talk radio quit a bit. Although alot of the time I just like to ride with the windows open and listen to the engine! I know, I'm weird

 

they did FICM harness according to the work order.

 

I posted the same problem on another thread. I am taking the list of solutions to the dealer Tuesday. This is what is so great about sites like this. You think you are the only one with a problem and it turns out a lot of folks are experiencing the same thing.

All I know is that I have 9,000 miles on this truck and there should not be ANY issues. This bucking and wheezing is dangerous because I never know when it is going to pop up. One minute you can accelerated with ease the next the car doesnt respond at all but you have the gas pedal mashed.

Grrrrrrrrrrrrrrrrrrr.

 

If there is another dealer who has a gret diesel mechanic nearby. i would try for a second opinion. Just like a Dr. But to me it sounds just like what we had (no power from stop and wondering if you are going to get rearended at the startup)

 

Well, after the dealer having my car for three days they came up with a bad EGR valve and replaced the EBP.

Again, the value of sites like this one is invaluable. People here diagnosed both my problems before I even got to the dealer!!

I also have a Pontiac Grand Prix and belong to a nationwide club. The few problems that I had with the car (drivers side window motor and alternator) were the exact same problems experienced by many GP owners.

Thanks guys for your help.

Richard

 

Well, after being in the dealer for 8 days, I think they have finally nailed my surge and buck issue. They replaced the engine wiring harness and the FICM wiring harness. Which one solved the problem?... is anybodys guess! All I know is that since I picked it up on Friday afternoon I have put about 400 miles on it, 300 of which were pulling my 35' travel trailer, and it ran like a champ! Never missed, surged or stahled.
However, on the way home I began to smell a burned wire smell (unmistakable smell). I pulled over and looked under the hood and could not see anything. It seemed to have went away after awhile until I pulled up in front of our house with the TT still behind me. I smelled it again, coming from the a/c vents. I hopped out and popped the hood. It was now overcast and a little darker out. I looked at the alternator and noticed the little rubbre boot was lifted up and out of the way. I looked closer and I could see sparking and it was glowing orange and red! I touched the alternator lead and it was loose! In noticed the nut, which was now starting to deteriorate from the heat was way up towards the top of the bolt like it had never been tightened. It was too late to tighten, the whole green lead area had been melted and sizzled! They replaced it today after they came to my house and flatbedded it away. Running perfect again.

After all of this I have one question. How far could I have driven on the two batteries with no alternator? Assuming I did not run headlights, a/c or anything else. After I discovered the problem, I tried to remove the nut but as I suspected it just twisted the whole bolt off the alternator. I taped up the end of the wire, checked how much charge I had on my batteries (95%) and drove my trailer to it's storage place which was roughly a 20 mile round trip. I tested the bats when I got home and they said 80%.

BTW, the service tech said he found a problem with the engine wiring harness (not just the FICM harness) and was causing shorts in the electrical system. Any of you having the bucking surging problem may want to inquire about it.

 

I am experiencing these same symptoms (black smoke and bucking). While it was at the dealership through the 4th of July weekend, both batteries went dead! They couldn't explain it, just replaced them. So far the problem was elusive. I am bringing it in tomorrow with this information.

 

I have about 3500 miles on it now without any problems at all! (knocking on wood right now!) Running awesome! Have them check the engine wire harness.
good luck!

 

The problem is fixed
https://www.ford-trucks.com/forums/s...d.php?t=399989