2001 ZX2 Loses Fuel Pressure nightly | Ford Escort Owners Association (FEOA)

2001 ZX2 Loses Fuel Pressure nightly

Discussion in 'Tech & Repair' started by Pete Kaufman, May 16, 2019.

  1. Pete Kaufman

    Pete Kaufman FEOA Member

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    My 2001 ZX2 loses fuel pressure over night and if sitting too long during day and have to crank multiple times i morning to get start. Once it fires it runs better as the pressure build back up. Fuel pump has been replace as well and as pressure sensor on fuel rail. What other things can I try to resolve this issue?
  2. Swift

    Swift FEOA Donator

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    Could be sticking injector releasing pressure.
  3. zzyzzx

    zzyzzx FEOA Member

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    Turn ignition on and wait until fuel pressure builds before cranking.
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  4. denisond3

    denisond3 Moderator Staff Member

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    I own five Escorts. Some of them hold pressure for a couple of days, some only for an hour or two, and one only holds it for about 5 minutes. I would agree it could be a sticking injector, but could also be the one way valve on the unit inside the fuel tank.

    Its not on my list of things to fix.
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  5. Joey_Twowagons

    Joey_Twowagons FEOA Member

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    I have a fuel pressure gauge inside my car, and I can see the fuel pressure drop to zero within a few seconds after the engine is stopped.

    When I turn the key on, the pressure promptly rises to about 30-35 psi. To start first thing in the morning I crank it for a second, then wait for a second or two to crank it again when it starts immediately.

    The wife's Honda also needs the double cranking technique.

    We've used that technique for years now, it saves wear and tear on the starter and there are no other driveability problems with the cars.
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  6. denisond3

    denisond3 Moderator Staff Member

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    I once connected an l.e.d. visible below the dash, to indicate when the injectors were begin triggered on my 94LX It showed me that the injectors are triggered once per each time the ignition key was turned to 'run' even if the engine wasnt started. I figured this was to make cold starting a little quicker.

    I also found out the injectors are turned off anytime you foot is off the gas and the car is coasting fast enough for the rpm to be above about 1400. Since this was on a 5-speed, when I knew to listen and feel for it, I could just barely tell when the injectors began triggering again. I havent yet tried that on one of my Escorts with the automatic transmission.
  7. Pete Kaufman

    Pete Kaufman FEOA Member

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    We are talking severla misnutes to get enough fuel to be able to start and even then not a given.
  8. zzyzzx

    zzyzzx FEOA Member

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    How many miles are on the fuel filter?
  9. Joey_Twowagons

    Joey_Twowagons FEOA Member

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    "We are talking severla misnutes to get enough fuel"

    How do you know this? Do you have a pressure gauge to monitor it?

    "the injectors are triggered once per each time the ignition key was turned to 'run'"

    This is no doubt why the double cranking works. The first time, there is no fuel pressure so there is no squirt of fuel to assist starting.

    "I also found out the injectors are turned off anytime you foot is off the gas and the car is coasting fast enough for the rpm to be above about 1400."

    This is mentioned in the Probst book on Ford Fuel Injection, and I have also noticed it occurring because I could hear a faint ticking of the injectors "telescoping" through my fuel pressure gauge.
    I don't recall the Probst book saying anything about manual vs. automatic transmissions, so it probably applies to both. It only occurs when the engine is warm.
    zzyzzx likes this.

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