# Ford F350 6.4 Diesel Throttle Lag

**URL:** <https://community.cartalk.com/t/ford-f350-6-4-diesel-throttle-lag/9714>\
**Category:** Power/Fuel\
**Tags:** diesel, ford\
**Created:** [January 22, 2008, 5:16pm UTC](https://community.cartalk.com/t/ford-f350-6-4-diesel-throttle-lag/9714 "2008-01-22T17:16:42Z")\
**Posts on this page:** 6\
**Page:** 1

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**Author:** ![jrplant76](https://sea1.discourse-cdn.com/cartalk/user_avatar/community.cartalk.com/jrplant76/32/634_2.png) [@jrplant76](https://community.cartalk.com/u/jrplant76)\
**Post date:** [January 22, 2008, 5:16pm UTC](https://community.cartalk.com/t/ford-f350-6-4-diesel-throttle-lag/9714/1 "2008-01-22T17:16:42Z")

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I recently purchased a new 08 F350 with the 6.4 Diesel. I am experiencing a significant amount of low RPM throttle lag from when I pushed down the accelerator to where the truck delivers the horsepower. I am also experiencing very low Fuel Economy of about 11 MPG with normal driving and no load. How do I help correct these issues?

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**Author:** ![mr\_josh](https://sea1.discourse-cdn.com/cartalk/user_avatar/community.cartalk.com/mr_josh/32/3008_2.png) [@mr\_josh](https://community.cartalk.com/u/mr_josh)\
**Post date:** [January 22, 2008, 5:31pm UTC](https://community.cartalk.com/t/ford-f350-6-4-diesel-throttle-lag/9714/2 "2008-01-22T17:31:40Z")

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I think you take it back to the dealer and complain, asap!

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**Author:** ![jimmythemechanic](https://sea1.discourse-cdn.com/cartalk/user_avatar/community.cartalk.com/jimmythemechanic/32/632_2.png) [@jimmythemechanic](https://community.cartalk.com/u/jimmythemechanic)\
**Post date:** [January 22, 2008, 5:34pm UTC](https://community.cartalk.com/t/ford-f350-6-4-diesel-throttle-lag/9714/3 "2008-01-22T17:34:10Z")

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Or go buy a Cummins

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**Author:** ![mr\_josh](https://sea1.discourse-cdn.com/cartalk/user_avatar/community.cartalk.com/mr_josh/32/3008_2.png) [@mr\_josh](https://community.cartalk.com/u/mr_josh)\
**Post date:** [January 22, 2008, 5:45pm UTC](https://community.cartalk.com/t/ford-f350-6-4-diesel-throttle-lag/9714/4 "2008-01-22T17:45:08Z")

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Yeah, it’s too bad they don’t put that Cummins in a good truck.

:-p

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**Author:** ![Beadsandbeads](https://avatars.discourse-cdn.com/v4/letter/b/c57346/32.png) [@Beadsandbeads](https://community.cartalk.com/u/Beadsandbeads)\
**Post date:** [January 22, 2008, 11:57pm UTC](https://community.cartalk.com/t/ford-f350-6-4-diesel-throttle-lag/9714/5 "2008-01-22T23:57:56Z")

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Does this engine have an electronically-controlled throttle rather than a cable? I have heard complaints about lag from late-model Crown Vic owners that have throttle-by-wire.

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**Author:** ![jrplant76](https://sea1.discourse-cdn.com/cartalk/user_avatar/community.cartalk.com/jrplant76/32/634_2.png) [@jrplant76](https://community.cartalk.com/u/jrplant76)\
**Post date:** [January 23, 2008, 4:17am UTC](https://community.cartalk.com/t/ford-f350-6-4-diesel-throttle-lag/9714/6 "2008-01-23T04:17:34Z")

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The throttle is controlled electronically. With my 7.3L Ford Diesel, I didn’t have this issue at all. I already took it to the dealership and they said that this is normal. Both Dodge and GMC have good throttle response.