So what did he say about the EGR code--the P0407? And IF the butterfly IS the concern then removing the butterfly will "fix" your problem. I'm willing to bet a cold beer it's NOT the butterfly. I've never seen or heard of one that even worked.

As a matter of fact, I'm reinstalling mine in the morning just to see if it WILL work. I get that P0488 code ALL the time because mine is unhooked/absent from the truck, but I also want to see if it affects my fan operation as well. Like I say. My truck ran for at least 4 years without the butterfly in place and I had NO concerns, but you have piqued my interest now.

 

After reading and re-reading, and re-reading this thread I figured I might as well add my two cents. I had ONE 2004 truck that I replaced the long block in, about two years and 80,000 kms. (50,000 miles) ago that came in with an intermittent black smoke/lack of power issue just over a month ago. It turned out, the EGR throttle plate was randomly closing uncommanded and losing turbo boost (due to starving for air). It too, had set the P0488 code. When I removed the intake elbow, I determined very quickly that the throttle plate would not respond to active commands. Reprogramming the PCM and replacing the throttle plate repaired this truck (which I verified with a post-repair road test). Once again, this was the ONLY truck I have ever replaced this part on. The symptom described by Grizzzzzzz sounds almost exactly like what this truck was doing when it rolled onto my doorstep. Take it for what it's worth. I hope this post doesn't cause me to loose a lot of respect from all the members I have gained so far.

 

Grizzzzzz, if you have an early 04 with the 03 6.0l in it then the throttle plate could be a dummy (inert). I have an 04 Ex with an 03 6.0l and the TP did not have a butterfly or shaft and the elec. plug to it had no connectors in it. It was a dummy plug. The TP has been replaced with a CFM Int. with no problems even the dealer said nothing about it during some warrenty work.

 

You certainly won't lose my respect. I'm glad for any and all information I can get. Do you happen to know what flash it had in it previously? I'm wondering if it was replaced in the strategy like the EGR valve having to be plugged in for the fan to work. I never used to get this code until I had my truck flashed last July when the FICM was replaced, and it was still the same strategy that it's been since July 07.

FWIW--if that's his concern then removing the throttle plate would be by far the quickest and cheapest fix.

 

I didn't replace my TPS plate today as I intended and I'm not going to. I ran around with the Dash Daq and data logged the fan going on and off. My fan comes on at 200* IF I'm sitting parked with the A/C running. It turns 850-900 RPM's at idle and will go to about 1200 RPM's with the motor reved up, regardless of RPM's. As soon as I start down the road it drops much less than motor RPM's--usually about 400. All this was with ambient air temperature of 97* and about 3000% humidity

 

Well, I can't thank you all enough. Simply taking out the plate worked wonderfully, I tried every way that I used to be able to make it act up and it simply ran through the gears like a champ. Also w/ my new FICM I really notice my power is back where it should be. I havn't tried towing yet but will be in the next couple of days so that will be the final test but as of now its fixed and I'm a happy panda.

 

good to hear. that would be the only one I have heard of... well that and Chan's

 

LOL add one more to the list... Mine is just starting to act up....

 

Chan I'm with you... I too have seen ONE!! Lack of power and black smoke. You can't say it's not something if you haven't looked at it, if it's on a truck one is liable to fail at some point of sometime!... So removed the flap and see if it fixes it, won't cost a dime.

 

Old thread but here is an update (according to the dealer my truck is parked at.)
2004 F250 6.0 Sinister EGR Delete. Truck would not start after running good all day, towed to dealer, diagnosed as FICM. Replaced. Still no start. Diagnosed as faulty EGR throttle. Butterfly staying closed. Repair kit updated 6 times (Again according to the dealer) and now runs 1100.00 installed. Special order only two in the country. FICM and EGR throttle kit 2400.00. I'm having a little trouble buying the dealers explanation that the EGR throttle circuit could damage the FICM or the other way around.
Any comments or thoughts appreciated.

 

Im not going to say it cant, I have worked on my share of trucks and its not a fault I have seen happen as you have it stated.
It is possible to have both a bad throttle plate and low voltage from a ficm, but that is just to bad items found at the same time.

 

Thanks cheezit. Being a paranoid ol fart I guess I worry that the ficm was misdiagnosed and the egr throttle was the problem. (Engine would crank very fast like no compression almost. From what I understand now that would make since if the butterfly was closed I guess. Also it appears I could have removed the plate entirely. I've learned more about these 6.0's than I ever wanted and the learning goes on! (Only 6.0 I have owned, replaced an 02 that was stolen last year.)
Thanks to all the contributers. Helped a lot!

 

My best guess is a service writer that doesnt convey what the tech is saying correctly