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4.0L OHV & SOHC V6 Tech General discussion of 4.0L OHV and SOHC V6 Ford Ranger engines.

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Old 10-08-2009
silverstreak4x4's Avatar
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S****y Gas Mileage

I recently changed my plugs and wires, with new Motorcraft wires and Motorcraft Platinum plugs. Since changing them my gas mileage has dropped like two miles a gallon. I was at 16is avg, and now at 14ish. What could it be??
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Old 10-08-2009
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my guess would be your gap.
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Old 10-08-2009
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what should the gap be?
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Old 10-08-2009
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My guess would be it"s on that sticker in front of the radiator.
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Old 10-08-2009
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i may be wrong but the gap is something like .41 inches
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Old 10-08-2009
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Originally Posted by 01b3000 View Post
i may be wrong but the gap is something like .41 inches
You may be wrong but not by much.
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Old 10-08-2009
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it may be .041" def not .41" but its on the white engine placard.
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Old 10-08-2009
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What engine? My 4.0L SOHC calls for a pretty big difference in acceptable gaps: .041-.060 if I recall. As per the sticker on the core support.
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Old 10-08-2009
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.044 is what i believe the OEM spec is
at least thats what the orillys guy said
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Old 10-08-2009
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Originally Posted by Toreador4x4 View Post
it may be .041" def not .41" but its on the white engine placard.
yea i messed up forgot the 0 thanks
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Old 10-08-2009
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i will pull them tomorrow and check
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