Power loss when towing uphill - Page 2 - Ford Powerstroke Diesel Forum
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  #11  
Old 07-01-2010, 02:06 PM
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My 5er weighs in at 10,200 and I was doing 40-45 when the fan kicked on and with it floored, I couldn't get above 30. No loss of coolant, or white smoke or anything to tell me it was the EGR cooler, or the oil cooler.
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  #12  
Old 07-03-2010, 03:01 PM
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Any one check for codes?? I have the exact same problem as you all are describing and when I checked codes it comes up with P0299 - Turbo Charger Underboost. I plan on having my turbo replaced as it is under warranty. Does anyone imagine that this could be our problem?? Bad turbo = not enough boost = poor performance??

PS. I have had my turbo "cleaned" just a thousand miles ago.
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  #13  
Old 07-04-2010, 06:17 AM
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I would have to lean to the turbo side of this as well (not a mechanic). The EGR cooler and OIL cooler shouldnt affect power unless the computer is limiting power because of the temps. My experience with my truck saw NO loss of power when I was flash boiling my coolant. Check your VGT accuator. Check to see if your turbo is clean and not rusted. I just got done cleaning mine while it was down (not real hard). Again this is just my .02.
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  #14  
Old 07-04-2010, 08:28 AM
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I am having a similar issue while towing my boat. I also get the p0299 code, and p0234. Turbo over boost and under boost.

I get the wrench symbol on the dash when it happens. I was led towards the EBP sensor by another member who is a Ford tech. I took the tube off the manifold, changed the fitting in the manifold, changed the tube, and cleaned the sensor. The tube was half blocked with carbon. The sensor was 75 percent blocked.

I just did all that this morning. I am towing my boat home tonight (85 miles). I will report later.

This seems like quite a common issue. If cleaning the sensor doesn't work, I will clean the turbo. If I had carbon like that in the sensor metering tube, I would imagine the turbo will have a decent carbon build up as well.

Is there a decent turbo swap/upgrade that can be done for more reliability?

By the way- 68k miles.
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  #15  
Old 07-04-2010, 07:19 PM
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Just got back from the 85 mile tow. Light came on about an hour into the tow. Every other time I have had this problem, I was in tow mode. This time I got it up to speed on the highway and took it out of tow.

When it happened I payed close attention to the boost gauge. When I advanced the the throttle on a slight incline, to hold my speed at 60mph, it downshifted once into 5th gear. Immediately after the downshift my boost spike from 15 to 32/34 psi, and immediately dropped to 10 when the light came on. No downshift, no boost, no power.

I dont know exactly how these turbos work. But it seems like something is going on with the variable geometry system. I understand that there is a unison ring, which is what moves the the vanes in or out (open or close I assume?). If part of this system was sticking, that would cause a boost spike- right? Or I am totally missing the fact here? Also, what are the sensors/solenoids/actuators (what ever they may be!) that are plugged into the turbo?
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  #16  
Old 07-04-2010, 07:43 PM
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Not wanting to steal the thread here, so I wont digress here too much. cRaZy8 - I believe that I have read that the current computer flash will throw the CEL with boosts over somewhere between 30-35psi. Again wouldnt bet my life on it but I believe that I have read that somewhere in the 4 forums I am a member of. I believe that Ford says that long periods of boost in the mid 30's psi, can stretch head bolts, and blow HG's. (Of course you have nice studs and HG's) Anyway, You and I had the same problem, I had carbon clogging the vanes on my turbo, had the vanes cleaned and unison ring replaced, now 1000miles later I am looking at a whole turbo, because for some reason it still wont generate enough boost (code-p0299). I would say that your logic is sound in reguards to sticking veins=turbo spike...But I am not a professional diesel tech, just a "compression ignition addict."
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  #17  
Old 07-04-2010, 07:51 PM
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Thats kind of what I am leaning towards- cleaning the vanes/ring. If that doesnt work, I do have a 3rd party warranty like you, and may just end up having the dealer do the work and try to get the turbo replaced.

I wish there was an upgrade to these turbos!!!

And yes, I do have the latest flash.
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  #18  
Old 07-08-2010, 01:19 PM
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I just installed an EGR Delete and new oil cooler. After reinstalling everything (PAIN IN THE ***) i went to start the truck and I have an egine light on and I have no turbo boost which means no power.
Anyone have an ideal what the heck is going on here??
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  #19  
Old 07-17-2010, 12:36 AM
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i HAVE SAME WHISTLE PROBLEM

I have the same whistle problem as u when I am towing up hill under with my foot into it. If i would let off the whistle noise would go away.

Have u found the cause on ur rig???
2006 f350 turbo disel.

Thanks in advance
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  #20  
Old 07-17-2010, 01:07 PM
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same problem

I have a 2005 CC FX4, 91,000 miles and took the family to the lake for a week. The truck ran fine pulling the boat up to the lake but for some reason when pulling the boat up from the ramp the truck chugged like crazy, black smoke billowing up and the blow off valve was working overtime. Overboost with no power. We were with another family and this was really embarrassing, as everyone knows I am a maintenance freak with my truck. After a week of pulling the boat up and down the ramp, the problem got worse. Coming home I was afraid we were going to have to get everything towed back. I started reading forums and ended up unplugging the egr after a clean and the problem seemed a little better but I was still getting a lot of overboost and no power. I started wondering if my turbo vanes were sticking and figured a replacement or a re-conditioning of the turbo was the problem. After psyching myself up for taking the turbo off, I got 3/4 of the way done and could not go any further. I figured I'd button it up and take it to Diesel injection service to have them diagnose the problem. Upon putting everything back together, I noticed a major build up of oil on the lower turbo boot. I cleaned it off and made a note to torque down all the boost tube clamps extra tight. When I test drove it, I could not believe that it drove better than new. My problem - overboost - black billowing smoke up hills when towing and sometimes when not, low power, and a lot of headache was all caused by loose intercooler boots! Guys - check your boots, clean and re-tighten clamps - I would be confident in saying that a bunch of those on this forum and other forums about the 6.0, would solve their problem by doing this. The company I work for bought a 2006 with a 6.0 and sent it to the netherlands. It is experiencing po299 code, and the same symptoms that mine did. I am going to instruct them to clean re-install and re-tighten the boots and I will get back to you on if this fixed their problem as well. Hope this works for those who are thinking that their problem is turbo or egr related!
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