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EGR valve blow-out can be caused by a clogged catalytic converter. A clogged cat. converter will cause pressure to back up in the engine. A test to perform is remove the front oxygen sensor from the exhaust to see if the engine runs better. Removing the oxygen sensor will relieve the pressure if, in fact the cat. converter is clogged. Another cause for EGR blow-out could be that the timing has jumped.The timing can be checked to diagnose this issue.
More than likely you have a faulty EGR Valve Pressure Sensor, especially if your EGR Valve Pressure Sensor is the original metal type. The new sensor is made of plastic and doesn't corrode like the old design. This sensor is located on the Intake Manifold.
The EGR valve can be tested with a Vacuum pump. If the diaphragm is bad, the valve will not change positions. Hence the error Code for the position sensor not opening to allow the valve to work. And the error code for the pressure sensor not registering a change in pressure because the EGR valve did not work.
So both sensors can give a false Code. On the other hand, you will see both sensors have Vacuum lines and electric connections. When the electricity is switched on, vacuum is suppose to flow back to the EGR Valve. That is why the first thing you do is test the EGR Valve to see if the diaphragm is broke.
If the EGR valve holds pressure it should be okay. Then you would want to check for pressure in the lines coming off of the switches. Remember to clear the onboard computer each time you replace a part, or you will get 25-35 Startups worth of false information.
Both Autozone and Oreillys will scan or clear your car for free. I hope you find my solution very helpful. You usually don't have a complete failure of all 3 parts at the same time.
scan it.to see if the camsensor or crank sensor also egr valve.working.make sure egr valve not stuck open.if all is good.your fuel pressure low.change fuel filter check fuel pressure.if fuel pressure good.you got a intake manifold leak or broke vacuum line .check power brake booster vacuum line.if look good remove brake booster check valve.blow through it.if you can replace it.if not its okay.a bad or dead fuel fuel injectors will cause engine to stall out.
The egr valve has two sensors. One is an EGR position sensor which is physically attached to the EGR valve. The other sensor is the DPFE (Delta Pressure Feedback EGR) sensor, commonly called the EGR pressure sensor. It's location varies depending on the engine you have. You can fine this sensor by following the vacuum hose on the EGR valve. It will be with in inches of the EGR valve. The sensor will be black (plastic) or silver (metal), have two or three vacuum ports and an electrical connection on it.
The vacuum pressure sensor is a high failure item on fords. Any Ford parts department will have one in stock, as well as some aftermarket parts stores.
The new sensor may not look exactly the same as the old part, but will have all the hook ups as the old one. You may also need to replace the vacuum hose to the sensor as well
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