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Things to consider for a 5.0 engine rebuild/reman

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    #31
    So the engine is in...and it is running pretty rough....the brain box...the Mark series ECM, does one have to tune or monkey with this?
    Is the firing order the same as the lo po?
    Is there a need to change the 02 sensors?

    (engine is 5.0 HO from a mark series)
    Last edited by Grand1; 10-02-2013, 10:24 PM.



    1978 Grand Marquis 460 2door "Blue Bomber"

    1987 LTD Crown Vic Canadian Tow Package 351w aka the "MI Mountie"

    1989 Colony Park ....Marge still lives!

    1979 Marquis creamy goodness

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      #32
      an HO does not use the same firing order as a non-HO. It needs to be 1-3-7-2-6-5-4-8 for an HO engine.

      should not need any monkeybusiness to make a Mark VII ECM run on a basically stock HO. Thats what they run in a Mark VII.

      New oxygen sensors aren't a bad idea if they are old, but they don't do anything until the engine warms up over 120F or so.
      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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        #33
        UPDATE.....SHIT. Car shakes. Red Engine Light goes on and off....engine runs ROUGH and then cuts off

        Confirmed the firing order is in....bad
        19lb injector?

        Have the right brain box in....my mechanic swears he hears a knock.....
        I got the cash....crate engine or reman?



        1978 Grand Marquis 460 2door "Blue Bomber"

        1987 LTD Crown Vic Canadian Tow Package 351w aka the "MI Mountie"

        1989 Colony Park ....Marge still lives!

        1979 Marquis creamy goodness

        Comment

          #34
          bad injector, bad wires, bad engine, huge intake leak, bad ignition module, timing WAY THE HELL out. Lots of stuff to check.

          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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