Is the EGR valve sensor out of Spec?
Is the EGR valve sensor out of Spec?
The EGR Valve Position (EVP) Sensor used exclusively by Ford, can be the cause of drivability problems without ever setting any trouble codes. The relationship between the EVP sensor and the EGR valve is important to understand. Either one being out of spec can cause similar symptoms.
Can a EGR valve be opened at 8 Hg?
The missing information is that Ford EGR valves will open 100% at 8 Hg. Therefore, 50% opening will be obtained by creating 4 Hg, etc. Now that you know this, you can open the EGR valve using a vacuum pump and watch the voltage on your digital voltmeter with the key on engine off.
How does the closed voltage of the EVP depend on the EGR?
The closed voltage of the EVP depends on the closed position EGR and the maximum voltage of the EVP depends on the position of the EGR when it is at maximum travel. Any position in between minimum and maximum depends on vacuum signal strength and the EGR return spring resistance to the vacuum signal.
How does the voltage of an EVP sensor work?
3) Sensor output to the computer. They both send a low voltage at closed position and a high voltage at maximum opening. The closed voltage of the EVP depends on the closed position EGR and the maximum voltage of the EVP depends on the position of the EGR when it is at maximum travel.
How do you replace an EGR valve pressure sensor?
Attach the EGR valve pressure sensor to the firewall with bolts. Fasten the negative battery cable of the vehicle to the battery post. To avoid burns, let the engine cool down before attempting to replace the EGR valve pressure sensor.
When to test the Ford EGR valve solenoid?
The following are the most common symptoms that a Ford (or Mercury or Lincoln) car or truck will usually experience when there’s a fault in the EGR System: Car or truck runs fine, but the check engine light (CEL) is on with an EGR Valve Fault Code: P0401 EGR System Flow Insufficient. P01406 EGR Valve Pintle Position.
What are the symptoms of a Ford EGR fault?
The following are the most common symptoms that a Ford (or Mercury or Lincoln) car or truck will usually experience when there’s a fault in the EGR system: P0401 EGR System Flow Insufficient. P01406 EGR Valve Pintle Position. Rough Idle. Really bad gas mileage.
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