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Has anyone used SeaFoam motor treatment on their Compass to clean their injectors or fuel system?
My 2010 Compass is throwing the p0420 code. Tried changing the plugs and putting in a higher octane fuel as well as a fuel additive, but
was gonna do a double whammy.
Any tips? Thanks!
 

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I would recommend this product. Guaranteed To Pass® Emissions Test Formula, 12 Fl Oz - 05063
You can purchase it at Wal-Mart or Auto Zone. I would use it at twice the strength so half a tank of gas or less and run it until almost empty.
I have done this with many vehicles with positive out comes. If it does not work than you may need new injectors. Or a professional high pressure injection cleaning.
 

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I don't use any additives in any vehicle I've ever owned and I've never had a problem.
But I do maintain them on a very regular basis. That's just a part of vehicle ownership IMHO
 
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