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Car misfire once or twice a week

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Old 05-16-2018, 03:40 AM
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Car misfire once or twice a week

My 07 Fit misfires maybe once or twice a week randomly, but only while stopped at red lights. It will misfire once and then not again for a week or so. I'm not too concerned but I'm curious as to what is going on and why it only misfires on occasion while stopped.
 
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Old 05-16-2018, 08:14 PM
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Ignition coils! Had EXACTLY same things on my Fit
 
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Old 05-17-2018, 11:45 AM
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Bear in mind that a weak spark will not 'set' any CEL codes. But it still results in a poor spark, and incomplete combustion, which you might not notice from the driver's seat.


The Holy Trinity of Fit misfire remedies:


1. Replace sparkplugs (new Iridiums)
2. Replace coils all at once (Hitachi part # ending in 053)
3. Adjust valve clearances (loose end of spec on exhausts)
 
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