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Old 11-28-2015, 05:58 PM   #12 (permalink)
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Location: NW INDIANA
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Originally Posted by charles_2000:34415266
I have a 2011 EcoBoost, I changed my plugs at 20k, and it smoothed out the idle. . I have not drilled the.050 hole in the tube. But I'm in North Texas is usually pretty dry here. I just had mine in for a warranty repair for the clogged catalytic converter p430 code, and they replaced the cat and reflashed the computer. Runs leaner now and my mpg went up to 19mpg mixed, up from about mix 16mpg for the first 3 years.
Thanks....... Did you use the SP534 plugs?
2012 Ford F150 FX4; Long Bed; 3.5L V6 ECO; Max Tow; 3.73; Leveled; 275/65R20 Goodyear Duratracs
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