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    What could be the most likely cause of a Ford PO174 code thank you

    #2
    On what?
    86 Lincoln Town Car (Galactica).
    5.0 HO, CompCams XE258,Scorpion 1.72 roller rockers, 3.55 K code rear, tow package, BHPerformance ported E7 heads, Tmoss Explorer intake, 65mm throttle body, Hedman 1 5/8" headers, 2.5" dual exhaust, ASP underdrive pulley

    91 Lincoln Mark VII LSC grandpa spec white and cranberry

    1984 Lincoln Continental TurboDiesel - rolls coal

    Originally posted by phayzer5
    I drive a Lincoln. I can't be bothered to shift like the peasants and rabble rousers

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      #3
      seems to be a lean code ( check for broken or disconnected vacuum lines ) but since I do not know what your working on this is the extent of any help I can offer.
      2007 Ford Crown Victoria LX Sport

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        #4
        Here's a nice little write-up.
        https://www.aa1car.com/library/ford_lean_codes.htm

        That said... could be a roached sensor, cracked exhaust manifold, loose manifold, loose downpipe, loose EGR pipe... Lots of stuff coming loose could cause that.

        Only two things are infinite, the universe and human stupidity, and I'm not sure about the former. -- Albert Einstein
        rides: 93 Crown Vic LX (The Red Velvet Cake), 2000 Crown Vic base model (Sandy), 2003 Expedition (the vacation beast)
        Originally posted by gadget73
        ... and it should all work like magic and unicorns and stuff.
        Originally posted by dmccaig
        Overhead, some poor bastards are flying in airplanes.

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