# RPM trouble

**URL:** <https://community.cartalk.com/t/rpm-trouble/11324>\
**Category:** Maintenance/Repairs\
**Tags:** rpm\
**Created:** [March 1, 2008, 5:01pm UTC](https://community.cartalk.com/t/rpm-trouble/11324 "2008-03-01T17:01:31Z")\
**Posts on this page:** 3\
**Page:** 1

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**Author:** ![sisa68](https://avatars.discourse-cdn.com/v4/letter/s/a9a28c/32.png) [@sisa68](https://community.cartalk.com/u/sisa68)\
**Post date:** [March 1, 2008, 5:01pm UTC](https://community.cartalk.com/t/rpm-trouble/11324/1 "2008-03-01T17:01:31Z")

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my rpm gauge is going crazy. it is running higher than normal, but the engine is staying the same. what is causing the rpm to move like this. also when i turn the car off, the rpm gauge goes all the way to the hgihest number, it use to go to zero

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**Author:** ![sisa68](https://avatars.discourse-cdn.com/v4/letter/s/a9a28c/32.png) [@sisa68](https://community.cartalk.com/u/sisa68)\
**Post date:** [March 1, 2008, 5:02pm UTC](https://community.cartalk.com/t/rpm-trouble/11324/2 "2008-03-01T17:02:02Z")

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my rpm gauge is going crazy. it is running higher than normal, but the engine is staying the same. what is causing the rpm to move like this. also when i turn the car off, the rpm gauge goes all the way to the hgihest number, it use to go to zero

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**Author:** ![Bill\_Russell](https://avatars.discourse-cdn.com/v4/letter/b/e5b9ba/32.png) [@Bill\_Russell](https://community.cartalk.com/u/Bill_Russell)\
**Post date:** [March 1, 2008, 5:08pm UTC](https://community.cartalk.com/t/rpm-trouble/11324/3 "2008-03-01T17:08:11Z")

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car, engine, mileage?  
So the tachometer is reading incorrectly? In modern cars, the tach is fed by the computer.