What is happening?!!?? - Ford Powerstroke Diesel Forum
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Old 11-12-2013, 08:06 PM
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What is happening?!!??

For the life of me I can't figure out what is happening with my truck. Only does it when it is really cold and around 1000-1600 rpm. Driving or sitting I can make it do it till the truck gets good and warm. It puts a load on engine then will come out of it with more throttle. I have a video of it but can't figure out how to load to here. Any ideas?


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Old 11-12-2013, 08:19 PM
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If I could figure out how to load the video I'm sure someone would know. It's hard to explain.


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Old 11-12-2013, 08:34 PM
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Sounds to me like the exhaust back pressure valve is working as it should. It is closing to help the engine warm up, acting like there's a "load". You'll hear a "woosh" sound. If you give it enough foot-feed, it'll open up , and run more like normal.
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Old 11-13-2013, 03:16 AM
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That's got to be it. It only started doing it the worst after I put my 5 inch out the side. Is there something I can do to help it. It seems excessive to me. I've had 6 diesels and never experienced this much.


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