Thursday, July 14, 2011

EGR valve has no signal of ford vehicle?

DRIVE-ABILITY SYMPTOMS
If something happens to the EVP sensor circuit to disrupt the EVP signal back to the computer, the computer has no way of monitoring or confirming the exact position of the EGR valve. Even so, it will still attempt to regulate the EGR valve based on other inputs such as throttle position and manifold absolute pressure. However, control will not be as accurate and some driveability problems may result.

If the engine is experiencing hesitation during acceleration, rough idle and/or hard starting, the problem is probably the EGR valve itself. Any of these symptoms could be caused by an EGR valve that's stuck in the open position, probably due to a buildup of carbon at the valve's base. Removing the valve and removing the accumulated carbon should solve the problem. When detonation is the primary driveability symptom, it means the EGR valve is failing to open. The loss of exhaust gas recirculation allows combustion temperatures to soar, resulting in spark knock during acceleration or when running under load. In this instance, the problem may be a faulty EGR valve (failed vacuum diaphragm) or a loss of vacuum to the valve (vacuum leak, faulty EGRC or EGRV vacuum solenoid, or an electrical problem in either of the two solenoid's control circuits).

Problems with the EVP sensor itself can be caused by electrical shorts or opens in the VREF, SIG RTN or EVP circuits. Bent or corroded pins in the electrical connectors account for most such faults. Another would be wear or sticking in the EVP sensor that would affect the accuracy of the EVP signal.

TROUBLESHOOTING
Ford lists a number of trouble codes that are related to the EVP sensor. These include:

Code 31 -- EVP out of limits. This code means the computer is not receiving a proper signal from the sensor. Disconnect and plug the vacuum line at the EGR valve and perform an "Engine Running Quick Test" to see if the code repeats. If it does, there's an electrical problem at the sensor. Use a digital ohm meter on the 200,000 scale to measure the sensor resistance between the EVP SIG and VREF terminals and then the SIG RTN and VREF terminals. It should be between 5500 (EGR valve closed) and 100 ohms (EGR valve open), and change smoothly and gradually as the valve is opened with a hand vacuum pump. You can also do this manually by removing the EVP sensor from the EGR valve and pushing the EVP shaft. If the sensor's resistance is out of specs, fails to change smoothly or change at all, replace the EVP sensor.

If the sensor itself checks out, use a digital voltmeter on the 20V scale to measure the VREF to SIG RTN voltage and the VREF to EVP signal voltage at the EVP harness connector (key on, engine off). You should see between 4 to 6V. If not, there's an electrical short or open in the wiring. Turn the key off, unplug the computer and use a breakout box to check wiring continuity. If no wiring faults can be found, replace the computer.
Code 32 -- EGR not controlling.
Code 33 -- EVP not closing
Code 34 -- No EGR flow Any of these three codes indicates a problem with the EGR valve itself, the EGRC or EGRV vacuum solenoids or a vacuum leak. A Code 83 (EGRC circuit fault) or Code 84 (EGRV circuit fault) would indicate an electrical problem in one of the solenoid circuits. The solenoids should have between 30 and 70 ohms resistance.

If the problem is not electrical, you'll have to use a vacuum gauge to figure out why vacuum isn't getting through. You should see the vacuum cycle on and off in less than 2 seconds at the EGR valve when the engine is at normal operating temperature and the throttle is opened and closed.

Always follow the diagnostic procedures outlined in your shop manual to isolate the fault when the EVP sensor appears to be faulty. If it turns out to be a bad sensor, replacing it is all you can do because no adjustments or repairs are possible .

In both cases, simple repairs are possible. The EGR valve can be clogged, and a simple cleaning of a mechanical EGR valve may solve the problem. In the case of an electrically controlled EGR valve or a more complex mechanical problem, replacement of the valve may be needed. The EGR valve is an expensive motor vehicle component, and care should be taken to ensure that it needs to be replaced rather than repaired. A reputable mechanic should advise you appropriately.

Failure to repair or replace the EGR valve will not lead to a life threatening condition, although it will reduce the life of your car and increase the potential emissions. Especially in areas which require smog testing, an automobile with a malfunctioning EGR valve may not pass.

Monday, July 11, 2011

How to remove HVAC housing on 2005 ford explorer?

Removal & Installation


NOTE
If an evaporator core leak is suspected, the evaporator core must be vacuum leak tested before it is removed from the vehicle.


NOTE
Installation of a new suction accumulator is not required when repairing the air conditioning system, except when there is physical evidence of contamination from a failed A/C compressor or damage to the accumulator.


NOTE
Lubricate the coolant hoses with plain water only if needed.

  1. Recover the refrigerant.
  2. Drain the engine coolant.
  3. Remove the instrument panel. See -Instrument Panel- under the -Body- section.
  4. Detach the wiring harness bracket (above the heater tube bracket) and position the harness aside.
  5. Remove the heater tube bracket nut.

    Click image to see an enlarged view

    Fig. Remove the heater tube bracket nut

  6. Remove the A/C line bracket nut at the dash panel.
  7. Disconnect the 2 heater hose clamps at the heater core.
  8. Disconnect the evaporator inlet fitting. Discard the O-ring seals.
  9. Disconnect the evaporator outlet fitting. Discard the O-ring seals.
  10. Disconnect the 2 vacuum connectors.

    Click image to see an enlarged view

    Fig. Disconnect the 2 vacuum connectors

  11. Detach the grommet and push the vacuum lines into the passenger compartment.
  12. Remove the 4 HVAC housing nuts.
  13. Disconnect the ground terminal bolt.
  14. Remove the HVAC housing.

    Click image to see an enlarged view

    Fig. Exploded view of the HVAC housing assembly: heater hoses (1), pressure hose (2), suction hose (3), vacuum connector (4), retaining nuts (5), screw (6), HVAC housing assembly (7), and O-ring seals (8)


To install:

  1. Position the HVAC housing into the vehicle.
  2. Disconnect the ground terminal bolt.
  3. Install the HVAC housing nuts. Tighten the nuts to 80 inch lbs. (9 Nm).
  4. Position the grommet and vacuum lines back into the dash panel.
  5. Connect the 2 vacuum connectors.
  6. Install new O-ring seals and connect the evaporator inlet and outlet fittings.
  7. Connect the heater hoses.
  8. Install the A/C line bracket nut at the dash panel.
  9. Install the heater tube bracket nut.
  10. Attach the wiring harness bracket (above the heater tube bracket)
  11. Install the instrument panel. See -Instrument Panel- under the -Body- section.
  12. Evacuate and recharge the A/C system.
  13. Refill the cooling system.
  14. Perform an A/C system leak test.


This are the sections, you can go through and click the link to read its troubleshooting.

---------

The car will not start?

http://schematicsdiagram.blogspot.com/2011/06/car-will-not-start.html

-----------------

Car will not crank?

http://schematicsdiagram.blogspot.com/2011/06/car-will-not-crank.html

-----------

Car has no spark?

http://schematicsdiagram.blogspot.com/2011/06/car-has-no-spark.html

-------------

How to troubleshoot car battery?

http://schematicsdiagram.blogspot.com/2011/06/how-to-troubleshoot-car-battery.html

-----------------

How to test starter solenoid?

http://schematicsdiagram.blogspot.com/2011/06/how-to-test-starter-solenoid.html

--------------------

How to test cars starter?

http://schematicsdiagram.blogspot.com/2011/06/how-to-test-cars-starter.html

How to replace starter in car?

http://schematicsdiagram.blogspot.com/2011/06/how-to-replace-starter-in-car.html

-----------

car will turn over but will not start?

http://technoanswers.blogspot.com/2011/05/car-will-turn-over-but-will-not-start.html

-----------------

The Brake Indicator Light Stays On dash of car?

http://schematicsdiagram.blogspot.com/2011/06/brake-indicator-light-stays-on-dash-of.html

The ABS and Traction Control Lights stays ON dash of car?

http://schematicsdiagram.blogspot.com/2011/06/abs-and-traction-control-lights-stays.html

Check Engine Light On car?

http://schematicsdiagram.blogspot.com/2011/06/check-engine-light-on-car.html

-------------------------

How to replace Interior Lights on car?

http://schematicsdiagram.blogspot.com/2011/06/how-to-replace-interior-lights-on-car.html

Car lights not working, even after replacing the bulb/lamp?

Click this link below:--

http://schematicsdiagram.blogspot.com/2011/06/car-lights-not-working-even-after.html

---------------

How to replace head lights on car?

http://schematicsdiagram.blogspot.com/2011/06/how-to-replace-head-lights-on-car.html

--------------------

How to replace Parking, turn, and Brake Lights on car?

http://schematicsdiagram.blogspot.com/2011/06/how-to-replace-parking-turn-and-brake.html


How to remove the door panel on car?

http://schematicsdiagram.blogspot.com/2011/06/how-to-remove-door-panel-on-car.html

How to replace power window motor in car?

http://schematicsdiagram.blogspot.com/2011/06/how-to-replace-power-window-motor-in.html

How to test relays on car?

http://schematicsdiagram.blogspot.com/2011/06/how-to-test-relays-on-car.html

-----------------------------



How to troubleshoot Engine Misfires?

http://schematicsdiagram.blogspot.com/2011/06/how-to-troubleshoot-engine-misfires.html

------------

The spark plug firing order for car?

http://schematicsdiagram.blogspot.com/2011/06/spark-plug-firing-order-for-car.html



------------------------

Where is the Thermostat located in car?

http://schematicsdiagram.blogspot.com/2011/06/where-is-thermostat-located-in-car.html

How to recharge AC on Auto/Truck/car?

http://schematicsdiagram.blogspot.com/2011/06/how-to-recharge-ac-on-autotruckcar.html



-------------------

How to trouble shoot speedometer?

http://schematicsdiagram.blogspot.com/2011/06/speedometer-not-working.html

To Order car parts online:--To get heavy discount on car parts .Click this link below:----

http://technoanswers.blogspot.com/2011/05/from-where-to-order-car-parts-online.html


For car error code diagnosis click the link below:---

http://www.automd.com/diagnose/?amdcid=apwldrbrd1

How to remove Heater Water Control Valve on 2005 Ford Explorer?

Removal & Installation


  1. Drain the engine coolant.
  2. Remove the air cleaner assembly.
  3. Disconnect the vacuum hose and heater hose.

    Click image to see an enlarged view

    Fig. Disconnect the vacuum hose and heater hose (arrows)

  4. Remove the retaining pins. Position the inner fender well access mat out of the way.

    Click image to see an enlarged view

    Fig. Remove the retaining pins and position the inner fender well access mat out of the way

  5. Disconnect the heater hose. Remove the bolt and the heater water control valve assembly.

    Click image to see an enlarged view

    Fig. Remove hose (arrow), bolt (arrow) and water heater control valve (arrow)


To install:

  1. Installation is the reverse of the removal procedure.
  2. Lubricate the coolant hoses with appropriate coolant, or plain water only, if needed.

2001-05 Explorer Sport/Sport-Trac



  1. Drain the engine coolant.
  2. Remove the air cleaner assembly.
  3. Disconnect the vacuum hose and heater hose.

    Click image to see an enlarged view

    Fig. Disconnect the vacuum hose and heater hose (arrows)

  4. Remove the retaining pins. Position the inner fender well access mat out of the way.

    Click image to see an enlarged view

    Fig. Remove the retaining pins and position the inner fender well access mat out of the way

  5. Disconnect the heater hose. Remove the bolt and the heater water control valve assembly.

    Click image to see an enlarged view

    Fig. Remove hose (arrow), bolt (arrow) and water heater control valve (arrow)


To install:

  1. Installation is the reverse of removal.
  2. Lubricate the coolant hoses with MERPOL® meeting Ford specification ESE-M99B144-B or plain water only, if needed.

2002-05 Explorer And Mountaineer



4.0L Engine
  1. Using suitable tools, clamp-off the heater hoses.

    Click image to see an enlarged view

    Fig. Clamp off hoses at areas indicated by arrows

  2. Disconnect the heater hoses and the vacuum line.

    Click image to see an enlarged view

    Fig. Disconnect the heater hoses and the vacuum line (arrows)

  3. Raise the vehicle.
  4. Remove the bolt and remove the heater control valve.
    1. Tightening torque 10 ft lbs. (14 Nm)

      Click image to see an enlarged view

      Fig. Remove bolt (arrow) and remove heater core



To install:

  1. Installation is the reverse of removal.
  2. Clean and lubricate the coolant hoses with coolant hose lubricant or plain water only if needed.
  3. Top-off the engine cooling system.

4.6L Engine
  1. Using suitable tools, clamp-off the heater hoses.

    Click image to see an enlarged view

    Fig. Clamp off heater hoses at areas indicated by arrows

  2. Disconnect the vacuum connector.
  3. Disconnect the heater hoses.
  4. Remove the heater control valve.

    Click image to see an enlarged view

    Fig. Disconnect vacuum hose (1), heater hoses (2) and remove control valve (3)


To install:

  1. Installation is the reverse of removal.
  2. Clean and lubricate the coolant hoses with coolant hose lubricant or plain water only if needed.
  3. Top-off the engine cooling system

4.0L Engine



  1. Using suitable tools, clamp-off the heater hoses.

    Click image to see an enlarged view

    Fig. Clamp off hoses at areas indicated by arrows

  2. Disconnect the heater hoses and the vacuum line.

    Click image to see an enlarged view

    Fig. Disconnect the heater hoses and the vacuum line (arrows)

  3. Raise the vehicle.
  4. Remove the bolt and remove the heater control valve. Tightening torque 10 ft lbs. (14 Nm)

    Click image to see an enlarged view

    Fig. Remove bolt (arrow) and remove heater core


To install:

  1. Installation is the reverse of the removal procedure.
  2. Clean and lubricate the coolant hoses with coolant hose lubricant or plain water only if needed.
  3. Top-off the engine cooling system.

4.6L Engine



  1. Using suitable tools, clamp-off the heater hoses.

    Click image to see an enlarged view

    Fig. Clamp off heater hoses at areas indicated by arrows

  2. Disconnect the vacuum connector.
  3. Disconnect the heater hoses.
  4. Remove the heater control valve.

    Click image to see an enlarged view

    Fig. Disconnect vacuum hose (1), heater hoses (2) and remove control valve (3)


To install:

  1. Installation is the reverse of the removal procedure.
  2. Clean and lubricate the coolant hoses with coolant hose lubricant or plain water only if needed.
  3. Top-off the engine cooling system

-------------

This are the sections, you can go through and click the link to read its troubleshooting.

---------

The car will not start?

http://schematicsdiagram.blogspot.com/2011/06/car-will-not-start.html

-----------------

Car will not crank?

http://schematicsdiagram.blogspot.com/2011/06/car-will-not-crank.html

-----------

Car has no spark?

http://schematicsdiagram.blogspot.com/2011/06/car-has-no-spark.html

-------------

How to troubleshoot car battery?

http://schematicsdiagram.blogspot.com/2011/06/how-to-troubleshoot-car-battery.html

-----------------

How to test starter solenoid?

http://schematicsdiagram.blogspot.com/2011/06/how-to-test-starter-solenoid.html

--------------------

How to test cars starter?

http://schematicsdiagram.blogspot.com/2011/06/how-to-test-cars-starter.html

How to replace starter in car?

http://schematicsdiagram.blogspot.com/2011/06/how-to-replace-starter-in-car.html

-----------

car will turn over but will not start?

http://technoanswers.blogspot.com/2011/05/car-will-turn-over-but-will-not-start.html

-----------------

The Brake Indicator Light Stays On dash of car?

http://schematicsdiagram.blogspot.com/2011/06/brake-indicator-light-stays-on-dash-of.html

The ABS and Traction Control Lights stays ON dash of car?

http://schematicsdiagram.blogspot.com/2011/06/abs-and-traction-control-lights-stays.html

Check Engine Light On car?

http://schematicsdiagram.blogspot.com/2011/06/check-engine-light-on-car.html

-------------------------

How to replace Interior Lights on car?

http://schematicsdiagram.blogspot.com/2011/06/how-to-replace-interior-lights-on-car.html

Car lights not working, even after replacing the bulb/lamp?

Click this link below:--

http://schematicsdiagram.blogspot.com/2011/06/car-lights-not-working-even-after.html

---------------

How to replace head lights on car?

http://schematicsdiagram.blogspot.com/2011/06/how-to-replace-head-lights-on-car.html

--------------------

How to replace Parking, turn, and Brake Lights on car?

http://schematicsdiagram.blogspot.com/2011/06/how-to-replace-parking-turn-and-brake.html


How to remove the door panel on car?

http://schematicsdiagram.blogspot.com/2011/06/how-to-remove-door-panel-on-car.html

How to replace power window motor in car?

http://schematicsdiagram.blogspot.com/2011/06/how-to-replace-power-window-motor-in.html

How to test relays on car?

http://schematicsdiagram.blogspot.com/2011/06/how-to-test-relays-on-car.html

-----------------------------



How to troubleshoot Engine Misfires?

http://schematicsdiagram.blogspot.com/2011/06/how-to-troubleshoot-engine-misfires.html

------------

The spark plug firing order for car?

http://schematicsdiagram.blogspot.com/2011/06/spark-plug-firing-order-for-car.html



------------------------

Where is the Thermostat located in car?

http://schematicsdiagram.blogspot.com/2011/06/where-is-thermostat-located-in-car.html

How to recharge AC on Auto/Truck/car?

http://schematicsdiagram.blogspot.com/2011/06/how-to-recharge-ac-on-autotruckcar.html



-------------------

How to trouble shoot speedometer?

http://schematicsdiagram.blogspot.com/2011/06/speedometer-not-working.html

To Order car parts online:--To get heavy discount on car parts .Click this link below:----

http://technoanswers.blogspot.com/2011/05/from-where-to-order-car-parts-online.html

For car error code diagnosis click the link below:---

http://www.automd.com/diagnose/?amdcid=apwldrbrd1