# Rough idle and a steady misfire

**URL:** <https://community.cartalk.com/t/rough-idle-and-a-steady-misfire/73382>\
**Category:** General Discussion\
**Tags:** avalon, toyota\
**Created:** [July 5, 2012, 3:04pm UTC](https://community.cartalk.com/t/rough-idle-and-a-steady-misfire/73382 "2012-07-05T15:04:46Z")\
**Posts on this page:** 2\
**Page:** 1

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**Author:** ![punjkora](https://avatars.discourse-cdn.com/v4/letter/p/e56c9b/32.png) [@punjkora](https://community.cartalk.com/u/punjkora)\
**Post date:** [July 5, 2012, 3:04pm UTC](https://community.cartalk.com/t/rough-idle-and-a-steady-misfire/73382/1 "2012-07-05T15:04:46Z")

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I have a 2000 Toyota Avalon XLS with 134k miles, engine is a v6 (3.0). It has a rough idle and a steady misfire. You can drive it sometimes and it will run perfect and you can drive it sometimes and it will misfire. I am getting codes P1150, P0300,P0302, P0304,P0306. Driving me nuts. Any ides?

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**Author:** ![Big\_Marc](https://avatars.discourse-cdn.com/v4/letter/b/9d8465/32.png) [@Big\_Marc](https://community.cartalk.com/u/Big_Marc)\
**Post date:** [July 5, 2012, 5:35pm UTC](https://community.cartalk.com/t/rough-idle-and-a-steady-misfire/73382/2 "2012-07-05T17:35:05Z")

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when wasw the last time you replaced the spark plugs?