# 99 Cadillac sts car problem?

**URL:** <https://community.cartalk.com/t/99-cadillac-sts-car-problem/98681>\
**Category:** General Discussion\
**Tags:** sts, cadillac\
**Created:** [January 17, 2017, 8:08pm UTC](https://community.cartalk.com/t/99-cadillac-sts-car-problem/98681 "2017-01-17T20:08:26Z")\
**Posts on this page:** 3\
**Page:** 1

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**Author:** ![michele\_brwnng](https://avatars.discourse-cdn.com/v4/letter/m/b5ac83/32.png) [@michele\_brwnng](https://community.cartalk.com/u/michele_brwnng)\
**Post date:** [January 17, 2017, 8:08pm UTC](https://community.cartalk.com/t/99-cadillac-sts-car-problem/98681/1 "2017-01-17T20:08:27Z")

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I left the key to the on postion for 2 hours and since then it idles ruff and in gear really ruff any suggestions?

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**Author:** ![the\_same\_mountainbike](https://avatars.discourse-cdn.com/v4/letter/t/c89c15/32.png) [@the\_same\_mountainbike](https://community.cartalk.com/u/the_same_mountainbike)\
**Post date:** [January 17, 2017, 8:12pm UTC](https://community.cartalk.com/t/99-cadillac-sts-car-problem/98681/2 "2017-01-17T20:12:45Z")

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Was the engine running?  
Did the battery go dead?

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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:** [January 18, 2017, 2:48am UTC](https://community.cartalk.com/t/99-cadillac-sts-car-problem/98681/3 "2017-01-18T02:48:41Z")

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Did you need jump start to get it going? Does it start OK now? Is there a yellow “check engine light on”?

You may have reset the engine computer by removing its power trying to start the car with a dead battery. The engine will run a bit rough until the computer “learns” the engine again. 50-100 miles should be plenty unless there is a check engine light, then you have a problem that a mechanic will need to address.