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  1. #1

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

  2. #2
    I'm an air-conditioned gypsy gadget73's Avatar
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    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 SE, triple black (Timewarp) - poly front bushings, KYB struts and shocks, Holley SystemMax1 lower intake, SilverFox AOD valve body,

    1984 Lincoln Continental TurboDiesel - rolls coal

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

  3. #3
    Member EaOutlaw1969's Avatar
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    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.
    2000 MGM LS Palm Beach Edition a work in progress

  4. #4
    Beater gonna beat sly's Avatar
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    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: 88 MGM (SOLD), 93 Vic, 2000 Crown Vic, 2003 Expedition
    Quote Originally Posted by gadget73
    ... and it should all work like magic and unicorns and stuff.
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    Overhead, some poor bastards are flying in airplanes.

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