# Mazda cx-7 sport rough idling on start

**URL:** <https://community.cartalk.com/t/mazda-cx-7-sport-rough-idling-on-start/67564>\
**Category:** Maintenance/Repairs\
**Created:** [September 1, 2011, 1:55pm UTC](https://community.cartalk.com/t/mazda-cx-7-sport-rough-idling-on-start/67564 "2011-09-01T13:55:58Z")\
**Posts on this page:** 4\
**Page:** 1

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**Author:** ![tvaughn54](https://avatars.discourse-cdn.com/v4/letter/t/f9ae1b/32.png) [@tvaughn54](https://community.cartalk.com/u/tvaughn54)\
**Post date:** [September 1, 2011, 1:55pm UTC](https://community.cartalk.com/t/mazda-cx-7-sport-rough-idling-on-start/67564/1 "2011-09-01T13:55:58Z")

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Mazda CX-7 sport that has rough idling when it is started and goes away when warmed up or driven. Is giving OBDII error code P0300 - multiple misfires. Where should I start looking?

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**Author:** ![jtsanders](https://avatars.discourse-cdn.com/v4/letter/j/c2a13f/32.png) [@jtsanders](https://community.cartalk.com/u/jtsanders)\
**Post date:** [September 1, 2011, 3:36pm UTC](https://community.cartalk.com/t/mazda-cx-7-sport-rough-idling-on-start/67564/2 "2011-09-01T15:36:34Z")

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How many miles on the SUV? I wonder if it might need new spark plugs?

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**Author:** ![tvaughn54](https://avatars.discourse-cdn.com/v4/letter/t/f9ae1b/32.png) [@tvaughn54](https://community.cartalk.com/u/tvaughn54)\
**Post date:** [September 1, 2011, 5:31pm UTC](https://community.cartalk.com/t/mazda-cx-7-sport-rough-idling-on-start/67564/3 "2011-09-01T17:31:49Z")

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75,000

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**Author:** ![bscar](https://sea1.discourse-cdn.com/cartalk/user_avatar/community.cartalk.com/bscar/32/34_2.png) [@bscar](https://community.cartalk.com/u/bscar)\
**Post date:** [September 3, 2011, 4:20am UTC](https://community.cartalk.com/t/mazda-cx-7-sport-rough-idling-on-start/67564/4 "2011-09-03T04:20:05Z")

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about right for needing new plugs/wires what model year is this?