# 1991 Ford Ranger - Thumps

**URL:** <https://community.cartalk.com/t/1991-ford-ranger-thumps/153367>\
**Category:** Maintenance/Repairs\
**Tags:** ford\
**Created:** [November 23, 2019, 12:10am UTC](https://community.cartalk.com/t/1991-ford-ranger-thumps/153367 "2019-11-23T00:10:57Z")\
**Posts on this page:** 4\
**Page:** 1

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**Author:** ![manuel\_jrrobles](https://avatars.discourse-cdn.com/v4/letter/m/8baadc/32.png) [@manuel\_jrrobles](https://community.cartalk.com/u/manuel_jrrobles)\
**Post date:** [November 23, 2019, 12:10am UTC](https://community.cartalk.com/t/1991-ford-ranger-thumps/153367/1 "2019-11-23T00:10:57Z")

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thumping noise and up and down temperature gauge

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**Author:** ![Mustangman](https://sea1.discourse-cdn.com/cartalk/user_avatar/community.cartalk.com/mustangman/32/44130_2.png) [@Mustangman](https://community.cartalk.com/u/Mustangman)\
**Post date:** [November 23, 2019, 2:18am UTC](https://community.cartalk.com/t/1991-ford-ranger-thumps/153367/2 "2019-11-23T02:18:17Z")

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sounds like 2 problems, but impossible to tell since you didn’t tell us hardly anything. Ad a LOT more info and we’ll try and help.

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**Author:** ![Purebred](https://sea1.discourse-cdn.com/cartalk/user_avatar/community.cartalk.com/purebred/32/46796_2.png) [@Purebred](https://community.cartalk.com/u/Purebred)\
**Post date:** [November 23, 2019, 11:08am UTC](https://community.cartalk.com/t/1991-ford-ranger-thumps/153367/3 "2019-11-23T11:08:31Z")

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Yes, please tell us more. I wonder if the thumping noise is air in your cooling system. Is the radiator full?

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**Author:** ![manuel\_jrrobles](https://avatars.discourse-cdn.com/v4/letter/m/8baadc/32.png) [@manuel\_jrrobles](https://community.cartalk.com/u/manuel_jrrobles)\
**Post date:** [November 23, 2019, 3:04pm UTC](https://community.cartalk.com/t/1991-ford-ranger-thumps/153367/4 "2019-11-23T15:04:56Z")

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I installed top and bottom radiator hoses , new thermostat , flushed system @ home and new ect sensor . No luck .Took it to a shop , maybe they could find problem with proper tools . Recommended motorcraft thermostat and sender . Still have the issue ???. Suggested a revised water pump for this 4.0 ol engine in my ranger . But offered no warranty ???