# 1993 Toyota Corolla Runs rough at idle

**URL:** <https://community.cartalk.com/t/1993-toyota-corolla-runs-rough-at-idle/33736>\
**Category:** Maintenance/Repairs\
**Tags:** corolla, rough, toyota\
**Created:** [July 21, 2009, 3:29am UTC](https://community.cartalk.com/t/1993-toyota-corolla-runs-rough-at-idle/33736 "2009-07-21T03:29:17Z")\
**Posts on this page:** 5\
**Page:** 1

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**Author:** ![Ryoohki](https://avatars.discourse-cdn.com/v4/letter/r/ecae2f/32.png) [@Ryoohki](https://community.cartalk.com/u/Ryoohki)\
**Post date:** [July 21, 2009, 3:29am UTC](https://community.cartalk.com/t/1993-toyota-corolla-runs-rough-at-idle/33736/1 "2009-07-21T03:29:17Z")

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Hello I have a 1993 Toyota Corolla and it has been running rough at idle and very low speeds. So far i have replaced the spark plugs (each of them had a grove worn into the center electrode) replacing them helped, however the car is still shaking quite a bit. It is only rough when it is in gear.

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**Author:** ![budd2049](https://avatars.discourse-cdn.com/v4/letter/b/77aa72/32.png) [@budd2049](https://community.cartalk.com/u/budd2049)\
**Post date:** [July 21, 2009, 3:32am UTC](https://community.cartalk.com/t/1993-toyota-corolla-runs-rough-at-idle/33736/2 "2009-07-21T03:32:06Z")

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Did you change out the plug wires along with the plugs? If they’re original, it’s definitely time. If this car has a distributor cap, replace it and the rotor as well.

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**Author:** ![Ryoohki](https://avatars.discourse-cdn.com/v4/letter/r/ecae2f/32.png) [@Ryoohki](https://community.cartalk.com/u/Ryoohki)\
**Post date:** [July 21, 2009, 3:34am UTC](https://community.cartalk.com/t/1993-toyota-corolla-runs-rough-at-idle/33736/3 "2009-07-21T03:34:56Z")

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I replaced the wires 2 years ago and the distributor and the rotor 6 years ago, however the ignition coil has never been replaced.

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**Author:** ![Xebadaih](https://avatars.discourse-cdn.com/v4/letter/x/d07c76/32.png) [@Xebadaih](https://community.cartalk.com/u/Xebadaih)\
**Post date:** [July 21, 2009, 4:15am UTC](https://community.cartalk.com/t/1993-toyota-corolla-runs-rough-at-idle/33736/4 "2009-07-21T04:15:07Z")

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Are you sure there was a groove worn in each of the electrodes? Or were these perhaps NGK V-Power plugs? Not a helpful question, but just curious.

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**Author:** ![Ryoohki](https://avatars.discourse-cdn.com/v4/letter/r/ecae2f/32.png) [@Ryoohki](https://community.cartalk.com/u/Ryoohki)\
**Post date:** [July 21, 2009, 4:22am UTC](https://community.cartalk.com/t/1993-toyota-corolla-runs-rough-at-idle/33736/5 "2009-07-21T04:22:25Z")

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Haha your right they were that makes sense now. Oh well they are gone now 😛 . I should add that i feel most of the vibration in the steering wheel.