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Old 06-13-2014, 10:30 AM   #20 (permalink)
sarguy01
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Join Date: Jan 2010
Location: Virginia Beach
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Mazda5 - '12 Mazda 5
90 day: 25.22 mpg (US)

Big D - '11 Dodge Durango Crew
90 day: 18.75 mpg (US)
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Quote:
Originally Posted by Daox View Post
Oh yeah, I also checked the plugs while I had them out. The gap was fairly large from .070 to .080. They are copper plugs, and pretty well worn.
From the service manual. Gap should be .039-.043. That could be your misfire...

D17A1, D17A2, D17Z1, D17Z4 engines
NGK: ZFR6J-11
DENSO: KJ20CR-L11
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