Bad plugs again?

Asked by SilverSPEED6 Mar 31, 2011 at 01:59 PM about the Mazda MAZDASPEED6

Question type: Maintenance & Repair

I have had to replace plugs 3 times in the last 3/4 months. does anybody have any idea why? i have been letting it warm up and idle out before driving and letting it idle for 30 seconds to a minute before turning it off to try to avoid the problem.
Ideas????

3 Answers
7,415

Jonathan answered 13 years ago

Have you been making sure to properly gap the plugs? What do the plugs look like when you pull the old ones out?

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SilverSPEED6 answered 13 years ago

the plugs have just been building up a lot of carbon and miss-firing. idk why it is running like that, it may be running lean

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7,415

Jonathan answered 13 years ago

Okay. Here's a chart to compare the plugs to, that should help with the diagnosis.

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