Re: NGK TR55IX in a 2008 Ranger 3.0
I was out of town the other day and seen a Ford dealer out of curiosity I stopped to ask about the plugs I have.
Going in knowing that they would push the motorcraft ones on me but to my surprise they never but did say they had a lot of complaints from people about using the the NGK TR55IX (7164) miss firing and other issues I cant recall at the moment.
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