Question about Plymouth Breeze

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Hi, '99 2.0L Plymouth Breeze will hardly idle, check engine codes indicate a problem with the EGR valve. One of the wires going to the vacuum control has a small area of insulation cracked off of it; it seems to have a solid connection, but I would like to know if this is the problem before replacing the EGR Valve. What should the current going to the control be? Also can the wires just be replaced? The EGR valve works when vacuum is applied, and I don't think there are any vacuum leaks. Any other suggestions on checking the EGR System?

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  • cebigler Jul 16, 2010

    solution was great, but refered-to figures could not be accessed.



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EGR Valve Leakage Test If the engine will not idle, stalls while idling or the idle is rough or slow, the poppet valve, located at the base of the EGR valve, may be leaking in the closed position.

  1. The engine should be OFF for the following test.
  2. Disconnect the rubber hose from the fitting at the top (vacuum motor) side of the EGR valve, and perform the following:
    1. Connect a hand-held vacuum pump to this fitting.
    2. Apply 15 in. (51 kPa) of vacuum to the pump, then observe the gauge reading on the pump.
    3. If the vacuum falls off, the diaphragm in the EGR valve has ruptured.
    4. Replace the EGR valve, as outlined later in this section. NOTE: The EGR valve, valve control and attaching hoses are replaced as an assembly.
    5. Go on to the next step.
  3. A small metal fitting (backpressure fitting) is located at the base of the EGR valve. A rubber backpressure hose connects it to the backpressure fitting on the EGR valve control. Disconnect this hose from the EGR valve fitting.
  4. Remove the air cleaner inlet tube from the throttle body.
  5. Using compressed air from an air nozzle with a rubber tip, apply about 50 psi (345 kPa) of regulated air to the metal backpressure fitting on the EGR valve.
  6. By hand, open the throttle to the wide open position. Air should NOT be heard coming from the intake manifold while applying air pressure to the fitting.
  7. If air CAN be heard coming from the intake manifold, the poppet valve is leaking at the bottom of the EGR valve. Replace the EGR valve.
Electric EGR Transducer Solenoid Test NOTE: Before disconnecting any vacuum hoses, place an identification mark on each of them for correct installation.
  1. Label, then disconnect each vacuum hose from the electric EGR transducer solenoid.
  2. Disengage the wiring harness connector from the transducer solenoid.
  3. Plug vacuum hose nipple A.
  4. Connect a hand-held vacuum pump to hose nipple B.
  5. Connect a positive pressure-type hand pump to hose nipple C. Fig. 3: Testing apparatus arrangement for the electric EGR transducer solenoid Hi, '99 2.0L Plymouth Breeze - 90904g22.gif

  6. Using 2 jumper wires, connect one between the transducer solenoid terminal and positive battery terminal, and the second wire to the remaining solenoid terminal.
  7. Connect and disconnect the second jumper wire to the negative battery terminal side, while applying vacuum and positive pressure to check airtightness. With vacuum applied, this test should produce the following results:
    • Jumper wire disconnected and positive pressure not applied should produce a vacuum leak.
    • Jumper wire disconnected and positive pressure applied should maintain vacuum.
    • Jumper wire connected and positive pressure not applied should maintain vacuum. Fig. 4: Measuring resistance between the solenoid terminals 90904g23.gif

  8. Using an ohmmeter, measure resistance between the transducer solenoid terminals.
  9. On 2.0L and 2.4L engines, the ohmmeter should read 25–35 ohms at approximately 68°F (20°C). On 2.5L engines, the ohmmeter should read 31–41 ohms at approximately 68°F (20°C).
  10. If the resistance measures out of specifications, replace the electric EGR transducer solenoid.

Posted on Jul 12, 2010

  • cebigler Jul 15, 2010

    Duane, this is great information. Could you also look up what the voltage/amps/resistance should be going to the transducer solenoid and how to check that? Thanks!

  • Duane Wong
    Duane Wong Jul 15, 2010

    On 2.5L engines, the ohmmeter should read 31-41 ohms at 68 deg. F.

    On 2.0L and 2.4L engines, the ohm reading should be 25-35 ohms at 68 deg. F.



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Egr valve will this make ie die every time you stop

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My 2002 Mercury Mountaineer idles rough, I changed pugs, coil and also took it to 2 different mechanics. Recently the code came on for P1400 . . .Im just wondering can this be the cause of the rough idle?

Hi, if your EGR valve is stuck open, it could cause a rough idle. P1400 indicates there is a problem with the EGR flowmeter. This may be the result of a valve that is stuck open or may be the cause or may be unrelated. What I recommend is to first check the vacuum hoses on the sensor/flowmeter and also check the hoses from the EGR solenoid to the EGR valve and from the intake manifold to the solenoid. If those are good, remove the EGR valve and inspect the EGR passages for blockage. Also check the valve for properoperation. The valve should default closed and open when engine vacuum is applied to the vacuum port. If you cannot find anything wrong, with the valve or passages, test the control solenoid that supplies vacuum to the EGR valve. It should click open when you apply 12 volts to it. If all this is good, check the wiring from the flowmeter to the computer for continuity. Please let me know if you have questions, and thanks for using FixYa.

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P400 code on a 2000 mitsubishi diamante

P0400 - Exhaust Gas Recirculation Flow Malfunction
The exhaust gas recirculation (EGR) valve is vacuum controlled valve that regulates the amount of exhaust gases that re-enter the cylinders. The powertrain control module (PCM) determines how much based on engine load, temp, and other conditions. If the PCM detects that the amount of exhaust gases entering the cylinder were insufficient or non-existent, this code is set.

Symptoms: No symptoms will likely be noticed by the driver other than the MIL (malfunction indicator lamp). However, non visible symptoms will be increased combustion temperature and increased Nox emissions.

Causes: A code P0400 may mean that one or more of the following has happened:
Plugged EGR passage which restricts the flow of exhaust gasses
Faulty EGR solenoid
Faulty EGR solenoid wiring/harness
Vacuum lines damaged/disconnected to the EGR valve solenoid or to the EGR valve
Faulty EGR valve

Possible Solutions: Since EGR valve designs are different, no one test will suffice:
Using a scan tool, operate the EGR valve with the engine running. If the engine stumbles, the problem was likely intermittent wiring problem or intermittent blockage problem
If engine doesn't stumble, operate the EGR valve manually, if possible. If engine doesn't stumble and die, the ports are likely plugged. Removal of valve and cleaning of all ports will be required
Checking of solenoid can only usually be done with a scan tool, because most solenoids operate with a duty cycle of voltage, rather than constant voltage
Check all vacuum lines, hoses, etc for any damage
Visually inspect the solenoid harness and the solenoid for damage
Replace EGR valve

Hope this helps.

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1 Answer


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