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will something bad happen with thoes spark plugs?

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Old 04-11-02, 02:59 PM
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will something bad happen with thoes spark plugs?
i just put in some NGK 7 plugs but i noticed that the privious owner had 2 7s and 2 9s they had a T and L on them. will anything happen? all of mine are L
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Old 04-11-02, 03:23 PM
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if i were you i would run the colder plug witch is the 9
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Old 04-11-02, 06:17 PM
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Re: will something bad happen with thoes spark plugs?
Originally posted by zooq
i just put in some NGK 7 plugs but i noticed that the privious owner had 2 7s and 2 9s they had a T and L on them. will anything happen? all of mine are L
L is for Leading and T is for Trailing. Leadings are 7's and Trailings are 9's; that is the stock configuration. I'd recommend swapping the top two plugs back to 9's.
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Old 04-11-02, 07:22 PM
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You better change your trailing back to 9s. If the trailing are too hot it'll cause preignition which is no no.
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