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95 Ranger dies when braking hard

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  • #1

    95 Ranger dies when braking hard

    My dads 95 3.0 Ranger had an issue with the inertia switch. He boss put his foot on it and pulled the plug out of it. BTW Ford really put the inertia in a terrible spot, right where you put your feet! So my Dad thought the problem was the pump, it wasn't. fixed the inertia switch (zip tie) and now we have the current issue.

    When he brakes hard the truck will idle terribly until is just dies. The fuel pressure drops down when this occurs, but the voltage to the pump is fine. The FPR holds vacuum, and the fuel pressure looks fine when accelerating. The fuel filter was replaced last month, and then pump was replace at the same time.
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  • #2
    check the pump relay under the hood my dads ranger would do the exact thing you are talking about and it was that

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    • #3
      fill the tank and see if it still does it

      there are quite a few different pumps for rangers, some have different depths for the pickup. Did he match the old with the new?
      Don't worry about what you can't change.
      Do the best you can with what you have.
      Be honest, even if it hurts.

      "Socialism is a philosophy of failure, the creed of ignorance, and the gospel of envy; Its inherent virtue is the equal sharing of misery" ... Winston Churchill

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      • #4
        Brake booster has a vacuum leak

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        • #5
          The fuel pressure drops, but the voltage is fine I checked it from the plug under the cab. He replaced only the pump and sock filter, so it should be mounted in the same spot. When I pump the brakes the vacuum doesnt drop drastically, or idle go down.

          I dont think it is a vacuum issue, because if the vacuum dropped the FP would actually go up, not down. The truck will run for a few seconds after stopping, it just idles very low and eventually dies. It also breaks up when you press the gas.

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          • #6
            damn guys no one?

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            • #7
              Have you searched for vacuum leaks yet? (shoot carb cleaner while idling)

              You seem confident that it is not a leak, but you should rule it out by troubleshooting for it.
              2006 Civic SI
              2009 Pilot
              1988 GT
              CRF50

              Widebody whore.

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              • #8
                Originally posted by big_tiger View Post
                The fuel pressure drops, but the voltage is fine I checked it from the plug under the cab. He replaced only the pump and sock filter, so it should be mounted in the same spot. When I pump the brakes the vacuum doesnt drop drastically, or idle go down.

                I dont think it is a vacuum issue, because if the vacuum dropped the FP would actually go up, not down. The truck will run for a few seconds after stopping, it just idles very low and eventually dies. It also breaks up when you press the gas.
                Is this on a full tank? If not it sounds like a pickup issue like Jyro mentioned.

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                • #9
                  Lazy iac valve and clean the tb
                  The only difference between a tax man and a taxidermist is that the taxidermist leaves the skin. -- Mark Twain

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                  • #10
                    I will try all of those things tomorrow.

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