# 2002 Elantra GT misfires during acceleration

**URL:** <https://community.cartalk.com/t/2002-elantra-gt-misfires-during-acceleration/42913>\
**Category:** Maintenance/Repairs\
**Tags:** hyundai, elantra\
**Created:** [January 20, 2010, 9:59pm UTC](https://community.cartalk.com/t/2002-elantra-gt-misfires-during-acceleration/42913 "2010-01-20T21:59:29Z")\
**Posts on this page:** 5\
**Page:** 1

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**Author:** ![Chugalong](https://avatars.discourse-cdn.com/v4/letter/c/d9b06d/32.png) [@Chugalong](https://community.cartalk.com/u/Chugalong)\
**Post date:** [January 20, 2010, 9:59pm UTC](https://community.cartalk.com/t/2002-elantra-gt-misfires-during-acceleration/42913/1 "2010-01-20T21:59:29Z")

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My 2002 Elantra GT misfires during acceleration especially when getting on interstate. When the engine is cold it will accelerate smoothly, but misfires when warm and under load during acceleration. The check engine light flickers on during prolonged acceleration, but does not stay on so there is no record of malfunction on the diagnostic computer. Any suggestions would be appreciated.

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**Author:** ![VDCdriver](https://sea1.discourse-cdn.com/cartalk/user_avatar/community.cartalk.com/vdcdriver/32/30_2.png) [@VDCdriver](https://community.cartalk.com/u/VDCdriver)\
**Post date:** [January 20, 2010, 10:00pm UTC](https://community.cartalk.com/t/2002-elantra-gt-misfires-during-acceleration/42913/2 "2010-01-20T22:00:53Z")

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When was the last time that the spark plugs were replaced?

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**Author:** ![Chugalong](https://avatars.discourse-cdn.com/v4/letter/c/d9b06d/32.png) [@Chugalong](https://community.cartalk.com/u/Chugalong)\
**Post date:** [January 20, 2010, 10:08pm UTC](https://community.cartalk.com/t/2002-elantra-gt-misfires-during-acceleration/42913/3 "2010-01-20T22:08:53Z")

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The plugs were changed 6 June 09 @ 52612 miles.

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**Author:** ![cigroller](https://avatars.discourse-cdn.com/v4/letter/c/c68b51/32.png) [@cigroller](https://community.cartalk.com/u/cigroller)\
**Post date:** [January 21, 2010, 12:41am UTC](https://community.cartalk.com/t/2002-elantra-gt-misfires-during-acceleration/42913/4 "2010-01-21T00:41:50Z")

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Since we don’t know how many miles are on it now, 52612K doesn’t say much, but presumably the plugs don’t have that many miles on them.

Were the wires done at the same time?

How are the fuel and air filters? If even close, I’d replace them.

Have the fuel pressure checked under load.

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**Author:** ![Chugalong](https://avatars.discourse-cdn.com/v4/letter/c/d9b06d/32.png) [@Chugalong](https://community.cartalk.com/u/Chugalong)\
**Post date:** [January 21, 2010, 12:49am UTC](https://community.cartalk.com/t/2002-elantra-gt-misfires-during-acceleration/42913/5 "2010-01-21T00:49:47Z")

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Current mileage is 58,000. Wires were not changed. Fuel filter was changed June 09. Air filter looks okay. Engine runs fine at interstate speeds and idles fine. Engine will accelerate smoothly when cold, but starts to misfire during acceleration after it warms. How do I check fuel pressure under load?