6.0l Diesel slow accelerating - Ford Powerstroke Diesel Forum
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Old 03-06-2012, 05:45 AM
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6.0l Diesel slow accelerating

My 2005 F350 crewcab dually is slow to accelerate buts seems OK once up to speed although it does seem like it has a slight surge. The boost gage goes all the way over while trying to accelerate. If I accelerate slowly and let off so it shifts I can get into high gear. It did set codes 0299 (under boost), 0478 (Exhaust pressure control valve high) and 0528 (Fan speed sensor circuit no signa)l. All the hoses are good and all clamps and connections are tight. I did replace the EGR cooler with a delete kit due to it leaking so I'm not sure if coolant went through the turbo and could have sludged it up. The truck has sat for awhile after changing the cooler, it also quit one day but it ended up being the cam sensor that time. Any ideas would be appreciated.
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Old 03-11-2012, 12:25 PM
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Slow accelerating update

The problem was the turbo. The unison ring and veins were stuck and I think this was from the coolant going through when the EGR cooler was leaking. I disassembled the hot side of the turbo and cleaned all the moving parts with a angle die grinder and scotch pad discs. Truck accelerates just like it should after the cleaning. Apparently this is a common problem with these turbos since Ford actually sells a cleaning kit which is nothing more than a couple gaskets and the scotch pad discs and the arbor for them.
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Old 03-11-2012, 07:06 PM
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thanks for the update.
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Old 03-12-2012, 04:42 AM
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Good to hear...how was the cam sensor fix? Did you do it or have someone else do it?
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Old 03-12-2012, 12:05 PM
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Cam sensor

On my 2wd it wasn't too bad to change. It's located above the and behind the p/s pump. Getting a hand up in there to unhook the connector was the hardest. A 1/4 in drive ratchet, 12 inch extension, a universal and a 10 mm socket is what's needed. Once you get the bolt out you can gently pry the sensor out, there is a power steering pipe/hose in the way. You can gently curve the sensor to clear this. Do the same putting it back in.
On my sons 4wd it was a little more difficult to get at. He had to drop the steering shock to be able to reach up in there. Both trucks are 2005 models, the 2wd had a code 2614 cam sensor open circuit. The 4wd set intermittent codes for the cam and crank sensors, he replaced both. On his 4wd the EDGE tuner ended up being the cause of all the codes and problems.

Last edited by tom64tbolt; 03-12-2012 at 12:09 PM. Reason: spelling
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