# F350 Dually with no pick up

**URL:** <https://community.cartalk.com/t/f350-dually-with-no-pick-up/58392>\
**Category:** Maintenance/Repairs\
**Tags:** e350, ford\
**Created:** [December 7, 2010, 5:07am UTC](https://community.cartalk.com/t/f350-dually-with-no-pick-up/58392 "2010-12-07T05:07:08Z")\
**Posts on this page:** 4\
**Page:** 1

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**Author:** ![elricm](https://avatars.discourse-cdn.com/v4/letter/e/779978/32.png) [@elricm](https://community.cartalk.com/u/elricm)\
**Post date:** [December 7, 2010, 5:07am UTC](https://community.cartalk.com/t/f350-dually-with-no-pick-up/58392/1 "2010-12-07T05:07:08Z")

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I have a 2001 F350 7.3L Dually and I have been very happy with it. However, on cold (below freezing) mornings when I don’t plug it in, the engine will start fine but until it warms up it will only go about 25 mph. It also makes a swishing sound below the passenger seat. It feels like it is being held back. Any help you can give me I would appreciate.

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**Author:** ![kawasaga](https://avatars.discourse-cdn.com/v4/letter/k/2acd7d/32.png) [@kawasaga](https://community.cartalk.com/u/kawasaga)\
**Post date:** [December 7, 2010, 5:40am UTC](https://community.cartalk.com/t/f350-dually-with-no-pick-up/58392/2 "2010-12-07T05:40:02Z")

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There is a butterfly valve in the turbo outlet that is closed under certain conditions. It’s main purpose is give resistance to the enginge so that it warms up faster than w/o it. There are some DOT and EPA requirements for the engine to get to temperature within a certain time. Anyhow, that valve is there to “load” the engine. There may be some calibrations that use it as a brake assist (i.e. exhaust brake). The valve will open if you push the throttle down far enough.

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**Author:** ![elricm](https://avatars.discourse-cdn.com/v4/letter/e/779978/32.png) [@elricm](https://community.cartalk.com/u/elricm)\
**Post date:** [December 7, 2010, 5:42am UTC](https://community.cartalk.com/t/f350-dually-with-no-pick-up/58392/3 "2010-12-07T05:42:10Z")

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Thank you very much! Can it get frozen and not respond in the cold weather? I have the throttle to the floor and I only get 25mph and I get there very slowly. If I don’t have it in gear the engine will throttle up normally.

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**Author:** ![kawasaga](https://avatars.discourse-cdn.com/v4/letter/k/2acd7d/32.png) [@kawasaga](https://community.cartalk.com/u/kawasaga)\
**Post date:** [December 7, 2010, 6:26am UTC](https://community.cartalk.com/t/f350-dually-with-no-pick-up/58392/4 "2010-12-07T06:26:59Z")

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It is computer controlled via an oil solenoid. You can see it at the back of the turbo…a ~1.5" cylinder with some linkage. I’ve not observed any stuck ones but that doesn’t preclude it happening.