Question about 2002 Ford Explorer

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Want idle on cold mornings.

I have replaced the egr valve, throttle bypass valve, and the dpfe sensor. On a cold morning when i start the explorer , i will idle for 30 sec than start to idle real rough, It will die out until i can get it warm enough by giving it gas.Doing this time its make the voom voom putt putt sound. Help Please!!!

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  • Ford Master
  • 975 Answers

Thinking possibly the air temp. sensor (mounted in the
air cleaner housing) Really need to see scan data to tell for sure
but that costs a fortune at a dealership.air temp sensor is fairly
cheap.

Posted on Jan 16, 2013

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Posted on Jan 02, 2017

landsend
  • 1066 Answers

SOURCE: rough start on 2001 escape

how about a simple tune-up?  Plugs and filters.

Posted on Apr 01, 2009

  • 1 Answer

SOURCE: replaced egr valve pressure sensor upstream and

where is da egr control solen noid located on the 1996 ford explorer?

Posted on Mar 09, 2012

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My 2006 escape 3.0 idles rough but seems to run smooth down the road.engine light is on and shows code po402 excessive egr flow. engine starts fine when cold, but cranks for about 10 seconds unless you...


P0402 Exhaust Gas Recirculation Flow Excessive Detected A code P0402 most likely means one or more of the following has happened:
  • The DPFE (differential pressure) sensor is faulty and needs to be replaced
  • There is a blockage in the EGR (most likely carbon buildup)
  • The EGR valve is faulty
  • The EGR valve may not be opening due to a lack of vacuum
  • Solutions
  • With a P0402, it is common for people to replace the EGR valve, only to have the problem return. The most likely solution is to replace the DPFE sensor.
    • Check the voltage at the DPFE sensor both at idle and when the EGR is open
    • Replace the DPFE sensor

May 04, 2011 | Ford Escape Cars & Trucks

1 Answer

Replaced plugs and wires 2002 ford explorer idles good even in drive or reverese tranmission sputters while driving at low rpms or in overdrive po code 1401 has been on since 42k now 108k


code 1401 means your dpfe or delta pressure feedback to your egr valve is defective and needs to be replaced. I would suggest you clean or replace your egr valve as well with throttle body cleaner. A defective dpfe can cause your vehicle to run lean and when near failure is certain, it will cause your vehicle to stumble.

Jan 26, 2011 | Ford Explorer Cars & Trucks

3 Answers

EGR flow in our 2000 Ford Expedition is insufficient. What does this mean?


Exhaust gas recirculation flow reduced. Could be caused by valve or gunk in the flow path. I'll paste a little bit about troubleshooting below. If you need specific instructions for repairing your system, please reply with your engine size/type.

The Exhaust Gas Recirculation (EGR) system is designed to reintroduce exhaust gas into the combustion chambers, thereby lowering combustion temperatures and reducing the formation of Oxides of Nitrogen (NO x ).
The amount of exhaust gas that is reintroduced into the combustion cycle is determined by several factors, such as: engine speed, engine vacuum, exhaust system backpressure, coolant temperature, throttle position. All EGR valves are vacuum operated. The EGR vacuum diagram for your particular vehicle is displayed on the Vehicle Emission Control Information (VECI) label.
The EGR system is Differential Pressure Feedback EGR (DPFE) system, controlled by the Powertrain Control Module (PCM) and composed of the following components: DPFE sensor (also referred to as the backpressure transducer), EGR Vacuum Regulator (EVR) solenoid, EGR valve, and assorted hoses.


COMPONENT TESTING

DPFE Sensor

  1. Disconnect the pressure hoses at the DPFE sensor.
  2. Connect a hand vacuum pump to the downstream pickup marked REF on the sensor.
  3. Using a multimeter, backprobe the SIG RTN circuit at the DPFE connector.
  4. With the ignition ON , signal voltage should be 0.20-0.70 volts.
  5. Apply 8-9 in. Hg of vacuum to the sensor. Voltage should be greater than 4 volts.
  6. Quickly release the vacuum from the sensor. Voltage should drop to less than 1 volt in 3 seconds.
  7. If the sensor does not respond as specified, check the power and ground circuits.
  8. If power and ground circuits are functional, the sensor is faulty.

EGR Valve Control Solenoid
  1. Remove the EVR solenoid.
  2. Attempt to lightly blow air into the EVR solenoid.
    1. If air blows through the solenoid, replace the solenoid with a new one.
    2. If air does not pass freely through the solenoid, continue with the test.

  3. Apply battery voltage (approximately 12 volts) and a ground to the EVR solenoid electrical terminals. Attempt to lightly blow air, once again, through the solenoid.
    1. If air does not pass through the solenoid, replace the solenoid with a new one.
    2. If air does not flow through the solenoid, the solenoid is OK.

  4. If the solenoid is functional but the problem still exists, check the power and ground circuits.

EGR Valve
  1. Install a tachometer on the engine, following the manufacturer's instructions.
  2. Detach the engine wiring harness connector from the Idle Air Control (IAC) solenoid.
  3. Disconnect and plug the vacuum supply hose from the EGR valve.
  4. Start the engine, then apply the parking brake, block the rear wheels and position the transmission in Neutral.
  5. Observe and note the idle speed.

If the engine will not idle with the IAC solenoid disconnected, provide an air bypass to the engine by slightly opening the throttle plate or by creating an intake vacuum leak. Do not allow the idle speed to exceed typical idle rpm.
  1. Using a hand-held vacuum pump, slowly apply 5-10 in. Hg (17-34 kPa) of vacuum to the EGR valve nipple.
    1. If the idle speed drops more than 100 rpm with the vacuum applied and returns to normal after the vacuum is removed, the EGR valve is OK.
    2. If the idle speed does not drop more than 100 rpm with the vacuum applied and return to normal after the vacuum is removed, inspect the EGR valve for a blockage; clean it if a blockage is found. Replace the EGR valve if no blockage is found, or if cleaning the valve does not remedy the malfunction.

Sep 27, 2010 | 2000 Ford Expedition

1 Answer

Check engine light on egr code


Check the EGR valve for functioning:

COMPONENT TESTING DPFE Sensor
  1. Disconnect the pressure hoses at the DPFE sensor.
  2. Connect a hand vacuum pump to the downstream pickup marked REF on the sensor.
  3. Using a multimeter, backprobe the SIG RTN circuit at the DPFE connector.
  4. With the ignition ON, signal voltage should be 0.20-0.70 volts.
  5. Apply 8-9 in. Hg of vacuum to the sensor. Voltage should be greater than 4 volts.
  6. Quickly release the vacuum from the sensor. Voltage should drop to less than 1 volt in 3 seconds.
  7. If the sensor does not respond as specified, check the power and ground circuits.
  8. If power and ground circuits are functional, the sensor is faulty.
EVR Solenoid
  1. Remove the EVR solenoid.
  2. Attempt to lightly blow air into the EVR solenoid.
    1. If air blows through the solenoid, replace the solenoid with a new one.
    2. If air does not pass freely through the solenoid, continue with the test.
  3. Apply battery voltage (approximately 12 volts) and a ground to the EVR solenoid electrical terminals. Attempt to lightly blow air, once again, through the solenoid.
    1. If air does not pass through the solenoid, replace the solenoid with a new one.
    2. If air does not flow through the solenoid, the solenoid is OK.
  4. If the solenoid is functional but the problem still exists, check the power and ground circuits.
EGR Valve
  1. Install a tachometer on the engine, following the manufacturer's instructions.
  2. Detach the engine wiring harness connector from the Idle Air Control (IAC) solenoid.
  3. Disconnect and plug the vacuum supply hose from the EGR valve.
  4. Start the engine, then apply the parking brake, block the rear wheels and position the transmission in Neutral.
  5. Observe and note the idle speed. NOTE: If the engine will not idle with the IAC solenoid disconnected, provide an air bypass to the engine by slightly opening the throttle plate or by creating an intake vacuum leak. Do not allow the idle speed to exceed typical idle rpm.
  6. Using a hand-held vacuum pump, slowly apply 5-10 in. Hg (17-34 kPa) of vacuum to the EGR valve nipple.
    1. If the idle speed drops more than 100 rpm with the vacuum applied and returns to normal after the vacuum is removed, the EGR valve is OK.
    2. If the idle speed does not drop more than 100 rpm with the vacuum applied and return to normal after the vacuum is removed, inspect the EGR valve for a blockage; clean it if a blockage is found. Replace the EGR valve if no blockage is found, or if cleaning the valve does not remedy the malfunction. ---

Sep 24, 2010 | 2000 Mercury Cougar

2 Answers

Replaced egr valve pressure sensor upstream and downstream oxygens sensors egr tube new egr valve new idle air control valve runs fine and idles fine one minute then starts idleing rough and dies starts...


r u gonna keep replacin parts-or do a scan 1st--not all problems show on a readout-like vacuum leaks or a failin computer--throttle body probly needs cleanin

Sep 06, 2010 | 1996 Ford Explorer

2 Answers

Service engine code P0402 for Ford Mustang


P0402 OBD-II Trouble Code - Exhaust Gas Recirculation Flow (EGR) Excessive Detected

What does that mean?
EGR stands for Exhaust Gas Recirculation. It is part of the vehicle emmissions system, and is used to reduce combustion temperature and pressure to control Oxides of Nitrogen. There are generally three parts to the EGR system: the EGR valve, an actuator solenoid, and a differential pressure sensor (DPF). These things work together to deliver the correct amount of recirculation based on engine temperature, load, etc. The P0402 code means that OBD detected an excessive amount of EGR.

Symptoms
You may notice drivability problems such as the engine may surge off idle. There may also be other symptoms.

Causes
A code P0402 most likely means one or more of the following has happened:
* The DPFE (differential pressure) sensor is faulty and needs to be replaced
* There is a blockage in the EGR (most likely carbon buildup)
* The EGR valve is faulty
* The EGR valve may not be opening due to a lack of vaccuum

Possible Solutions
With a P0402, it is common for people to replace the EGR valve, only to have the problem return. The most likely solution is to replace the DPFE sensor.
* Check the voltage at the DPFE sensor both at idle and when the EGR is open
* Replace the DPFE sensor

Hope helps (remember rated and comment this).

May 27, 2010 | 2001 Ford Mustang

1 Answer

Have a 401 code have changed all emission parts and cleaned throttle body any solution


Engine size? year? This code is for insufficient egr, usually caused by clogged egr passeges or a bad DPFE sensor. Open egr valve, if the engine idles real rough or stalls, replace the DPFE sensor. If the idle does not change, then take the egr valve off and clean the passages. You cant just keep changing parts hoping you get lucky and change the correct one.

May 24, 2010 | Ford F-150 Cars & Trucks

1 Answer

Rough start on 2001 escape


how about a simple tune-up?  Plugs and filters.

Mar 28, 2009 | 2001 Ford Escape

2 Answers

Rough idle, surges when cold


have it scanned,ck' tps sensor,mass air sensor,idle air sensor for output...kev-mn.

Dec 10, 2008 | 2002 Ford Escape

2 Answers

HELP


near the throttle body part there is a electronic idle control valve either this control valve is defect or there is a leak between the body and the valve.

regards Sam (holland Europe)

May 14, 2008 | 2003 Dodge B Series Cargo

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