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Can a bad egr valve cause a vehicle to not want to take gas

Posted by Anonymous on


3 Related Answers



  • 85239 Answers

SOURCE: Had a bad egr valve

You have a plugged exhaust, replace the catylictic converter and find out what make it fail and plug, rich fuel mixture is most common cause of overheated burnt cat. The EGR is just a symtom of the plugged exhaust.

Posted on Aug 02, 2008


Steve Jensen

  • 417 Answers

SOURCE: Check engine light comes on indicates EGR flow

the electronic vacuum regulator, also the solenoid and the differential pressure feedback sensor. check for specified voltage for vehicle cold and warm. all components should be on same line.

Posted on Jul 02, 2010


Jeffrey Turcotte

  • 8984 Answers

SOURCE: I have a 2005 Dodge

It can affect mileage, but it might not be the valve. EGR systems tends to get clogged by gunk. Take the valve off and see how dirty things are. If the system is clogged up, take apart as much as you can to clean it up. You can test the valve for operation with a good scanner (autozone doesn't do this--they just tell you the code). Here are instructions from

Linear EGR Valve Diagnosis
The linear EGR valve diagnosis procedure varies depending on the vehicle make and model year. Always follow the recommended procedure in the vehicle manufacturer's service manual. The scan tester may be used to diagnosis a linear EGR valve. The engine should be at normal operating temperature prior to EGR valve diagnosis. Since the linear EGR valve has an EVP sensor, the actual pintle position may be checked on the scan tester. The pintle position should not exceed 3% at idle speed. The scan tester may be operated to command a specific pintle position, such as 75%, and this commanded position should be achieved within two seconds. With the engine idling, select various pintle positions and check the actual pintle position. The pintle position should always be within 10% of the commanded position. When the linear EGR valve does not operate properly:

  • Check the fuse in the 12 V supply wire to the EGR valve.
  • Check for open circuits, grounds, and shorts in the wires connected from the EGR valve winding to the PCM.
  • Use a digital voltmeter to check for 5 v on the reference wire to the evp sensor.
  • Check for excessive resistance in the EVP sensor ground wire.
  • Leave the wiring harness connected to the valve, and remove the valve. Connect a digital voltmeter from the pintle position wire at the EGR valve to ground, and manually push the pintle upward. The voltmeter reading should change from approximately 1 V to 4.5 V.
436f9a1.jpg Linear EGR valve circuit. Courtesy of Chevrolet Motor Division-GMC.
If the EGR valve did not operate properly on the scan tester and tests 1 through 5 are satisfactory, replace the valve.

Here is what your valve looks like:
If you have more questions, please let me know.

Posted on Oct 13, 2010

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How do you know if your EGR valve needs replacing?

Symptoms of a Bad EGR Valve ' AxleAddict > Auto Repair > DIY Auto Repair
Mar 8, 2018 - If the EGR Valve Sticks Open: A rough idle upon starting the engine (that is, when the engine is cold) and sometimes at a stop light or while looking for a spot in a parking lot (that is, at low engine speeds in a warmed-up engine). Stalling when the engine idles. Increase in fuel consumption.

Does your EGR valve need replacing? ' Blog Aug 17, 2017 - Before removing anything, check that the replacement EGR valve you've bought looks identical to the old one with the same connections and fittings. If the EGR valve has vacuum pipes to it, label them before twisting and pulling the pipes off by hand, being careful not to break or stretch them too much.

Symptoms of a Bad or Failing Exhaust Gas Recirculation (EGR) Valve ... > Articles Jan 7, 2016 - If the computer detects an issue with the vehicle's EGR valve circuit or position, it will set off the Check Engine Light in order to notify the driver of the issue. ... the vehicle inspected by a professional technician, such as one from YourMechanic, to determine if the vehicle needs an EGR valve replacement.

Signs of a Bad EGR Valve - RepairPal > Encyclopedia > Exhaust and Emissions Jul 4, 2008 - A scan tool will show both trouble codes and live data related to the EGR valve. It may also have a function for remote EGR valve control. A valve that is found to be bad should be replaced. If EGR-related problems persist after valve replacement, the issue may be the EGR passages in the intake manifold or ...

Symptoms of a bad egr valve how to change a bad egr valve - YouTube

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What Are the Signs of a Bad EGR Valve? - NAPA Know How Blog Sep 5, 2017 - A bad EGR valve is no longer able to control emissions and drastically reduces fuel economy. Here are the signs that you need to get yours looked at.

Apr 27, 2018 | Cars & Trucks

1 Answer

2003 hyundai santa fe po401

P0401 means Insufficient Exhaust Gas Recirculation (EGR) Flow. The computer has detected that something is wrong with the EGR system. Can be caused by the EGR tube being blocked/restricted, bad EGR valve, EGR valve not opening (no vacuum), or a bad sensor.

Nov 23, 2016 | Hyundai Cars & Trucks

1 Answer

Jerking when gas is pushed or in idle

It has been my experience with nissan that from your description, the EGR valve is bad."exaust gas recurculater" However it also may have a fuel filter issue due to perhaps water in fuel, trash,etc. If the engine operates correctly once you get it past the "shaky"area then the chances of the EGR valve being bad are better.
Hope this helps.....Good Luck!

Mar 28, 2013 | 2000 Nissan Xterra

1 Answer

I brought it to advance auto for them to check it.Diagnostic said Malfuctioning egr valve.Can this cause the vehicle to idle alittle ruff & Hesitate on acceleration?Any advice would help alot ty.

Absolutely. The EGR controls the air to gas ratio in the sense that recycling unspent gas vapor is a large part of the engine's combustion. If it is faulty, expect hesitation or shuddering. Also, the EGR valve is cheap and easy to install on most vehicles.

Nov 10, 2012 | 2001 Chrysler Voyager

2 Answers

P0401 exhaust gas recirculation flow insuficient detected

depending on the year make and model of the vehicle, the most likely cause of this code is the DPFE sensor which controls EGR operation.

Jul 14, 2011 | Ford Focus Cars & Trucks

1 Answer

Engine light comes on so they scan it and they told me egr valvue

The problem is that your EGR valve needs replaced. What these do is they allow a precise quantity of exhaust back into the intake manifold; Provides a great help for an efficient combustion process and improved engine performance, when thes go bad your perfomance drops off and it does not run as clean.
The EGR valve, or Exhaust Gas Recirculation valve, is a vacuum-controlled valve which allows exhaust back into the intake manifold in controlled amounts. The EGR valve can clog and get contaminated over time by carbon buildup, at which point it will require replacement. A malfunctioning valve can cause the engine exhaust pressure to drop and send engine warnings to the computer. It can also cause engine back pressure to drop, reducing gas mileage and engine
This is for a dodge ram, as I have no idea what car you have but this is a general tip.
  • Locate the EGR valve in the engine bay. The year and make of the Dodge vehicle determine where the valve is located. This is on the front of the engine block, next to the timing belt in model-year 2005 and newer trucks. In older vehicles you will typically find the valve behind the engine, near the firewall.

  • Unclip the exhaust tube from the side of the valve. You can do this by hand. Shift the tube from side to side until it slides off.Use a flat-head screwdriver to remove the EGR valve from the exhaust tube. There is a screw on each side of the tube.

    Disconnect the harness from the EGR valve. Use your hand to pull up on the tab and slide the harness from the valve.

    Use a flat-head screwdriver to remove the two screws that secure the EGR valve to the cylinder head. Remove the EGR valve and clean the surface of the cylinder.

    Attach the new EGR valve to the cylinder head and tighten it down with the same screws that were previously installed.

    Reattach the harness and reattach the exhaust tube to the valve. Tighten the two flat-head screws that hold the tube to the valve.

    Reattach the hose to the valve and use your hand to attach the clip to the hose.

    Mar 15, 2011 | Dodge Caravan Cars & Trucks

    1 Answer

    Just replaced EGR hose & valve copver gaskets on 2002 Ford Escape 4WD. Did test drive, runs really rough & almost stops & cuts off. Any ideas?

    OK, if you replaced the EGR hose, did you go all the way to change the EGR Valve? A stuck open EGR Valve can cause a rough idle and almost make it cut off.
    Also, a vacuum leak on the EGR valve can cause a rough idle.

    prev.gif next.gif Exhaust Gas Recirculation (EGR) Valve Removal & Installation 2.0L Zetec Engine NOTE: When the EGR tube is disconnected from the EGR valve, it must be discarded and a new EGR tube must be installed. The aluminum threads on the EGR valve must be inspected, and a new EGR valve installed if the threads are damaged.
    To Remove:
    1. Disconnect the negative battery cable.
    2. Remove and discard the exhaust manifold-to-EGR tube. Use the following as a guide:
    3. Raise and safely support the vehicle
    4. Remove the splash shield
    5. Disconnect the EGR tube fitting
    6. Lower the vehicle
    7. Remove the air cleaner outlet pipe
    8. Disconnect the EGR tube from the EGR valve.
    9. Detach the vacuum line and remove the two retainer bolts.
    NOTE: The EGR valve sealing surfaces are soft metals and easily damaged.
    To Install:
    1. Installation is a reverse of the removal process. Carefully clean all sealing surfaces and install a new EGR valve gasket.
    2. Install a new EGR valve tube.
    Detach the vacuum line (#1) and unbolt the EGR valve - 2.0L 02-04_escape_emissions_022.gif

    3.0L (4v) Engine To Remove:
    1. Disconnect the vacuum line.
    2. Disconnect the EGR tube.
    3. Remove the EGR valve and discard the gasket.
    NOTE: The EGR valve sealing surfaces are soft metals and easily damaged.
    To Install:
    1. Installation is a reverse of the removal process. Carefully clean all sealing surfaces and install a new EGR valve gasket.
    Detach the vacuum line (#1), unthread the EGR tube (#2) and remove the EGR valve bolts (#3) - 3.0L (4V) 02-04_escape_emissions_023.gif

    Aug 02, 2010 | 2002 Ford Escape

    1 Answer

    Intermittently won't hold idle and stalls

    The symptom you describe can be caused by either a bad or dirty EGR vavle or a broken / defective vacuum line.

    Try this
    1. disconnect and plug off the EGR vacuum supply line

    2. Connect a vacuum hose of equal size to the EGR valve.

    3. Start vehicle

    4. draw a vacuum on the line orally.

    a. the engine should die or run really bad.

    5. Restart vehicle and repeat checking for same result.

    6. If EGR valve is performing correctly as stated in steps 4 and 5 thern you most likely have a bad / cracked / damaged vacuum line somewhere.

    7. Reconnect original vacuum line to the EGR Valve

    8. Locate source of Vacuum leak.

    Jan 27, 2010 | 1995 Jeep Grand Cherokee

    2 Answers

    What is the purpose of an egr valve?

    exhaust recirculation helps with nox when you go through emissions

    Oct 16, 2009 | 1988 Chevrolet S-10

    1 Answer

    2001 chevy impala

    You might get some gas treatment for your tank. Sometimes bad gas can cause those symptoms.
    I would put the treatment in and let it sit overnight. Hopefully the next morning the car will feel better!
    I hope this helps... Good luck!

    Sep 24, 2009 | 2001 Chevrolet Impala

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