Question about 1991 Dodge Dakota
Posted by Anonymous on
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
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
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 autozone.com:
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:
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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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.
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