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Car wont turn up any RPMS

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    #1

    Car wont turn up any RPMS

    I had the car down to the track tonight. The first time with the C-4. It ran MUCH better then it did with the AOD.

    Here is what my problem is tho....

    I took it out to test tire sizes in the hot laps( just 5 laps around the track to get a good feel of the car) it ran pretty fast, but only turned up 5,400 and idle really rough. When I was done I pulled it in and checked under the hood and found that 2 plug wires had poped off. I put them back on, and went back out for the heat race. The car ran good again, I led every lap but the last one....the guy got around me. But it still only turned up 5,500.

    It seemed to pull pretty hard down the track till it started getting near the end and it felt like it was breaking down, or it was hitting the rev limiter....


    It has a lincoln MK7 comp, I thought the rev limiter on them was 6,250?


    Does anyone have any ideas of what might be the problem? any thing I should check?



    thanks
    Tags: None
    #2
    Sounds like valve float. What heads are you running, and are you using stock valve springs?

    2001 Ford Crown Victoria P71 - "The Fire Engine"
    1985 Lincoln Town Car Signature Series
    But God demonstrates his own love for us in this: While we were still sinners, Christ died for us. Romans 5:8

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      #3
      E7s with GT40 springs

      Comment

        #4
        gt40 springs, like stock explorer gt40 springs? that'll be your problem. You probably need better valve springs.
        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

        Comment

          #5
          I was told that it has GT40 springs, I dont think they are the gt40p springs.

          Comment

            #6
            The motor pulls strong till about 5,500, and then kinda flattens out.

            I dont know if its springs, fuel(wich i dont know how it has a new 255lph pump)......

            Comment

              #7
              the gt40 explorer springs sucked too. if thats what the springs are, it may be your problem. without knowing exactly what the seat pressure and all, its hard to say what it might be.
              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

              Comment

                #8
                I am going to pull the valve covers off one day this week, and check. Thanks

                Comment

                  #9
                  I didnt get a chance to check the valve springs yet, I am going to do that Monday or tuesday next week.

                  I did put a new coil in it, and changed the plugs tho just incase that could have had anything to fo with it....

                  Comment

                    #10
                    I'm surprised it runs that high with gt40 springs.

                    40 or 40p doesn't matter, they both suck.
                    Builder/Owner of Badass Panther Wagons

                    Busy maintaining a fleet of Fords

                    Comment

                      #11
                      I can attest to that. Know what else I can attest to? You're gonna have to pull your entire wiper box/motor and A/C equipment to replace your valve springs if they're weak. Sucks, but there's not really any way around it. Ask me how I know.
                      2011 Mustang GT Premium, MT82, Kona/Saddle, HIDs, 3.73s, 19s, hood/side stripes, UPR 1.5" springs with adjustable panhard bar, and UMI solid LCAs and relocation brackets.
                      1992 Explorer Eddie Bauer, slight lift, 34s, and A/C...
                      1979 Bronco Custom, 351M/C6/NP205, 4" lift, 35s, lots of fender trimming.

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