How to test for proper EGR flow (restricted intake passage) - Ford

توضیحات:

This engine has restricted EGR passages in the intake manifold/throttle body. In this video I will show you the steps involved in identifying this problem. Many EGR valves, DPFE sensors and EVR solenoids get replaced needlessly for this problem.
The engine being tested is a 4.6L on an OBD1 system however the procedures shown are the same for both OBD I and OBD II vehicles. The only difference is in the trouble code number. I believe the OBD II version of this 332 code is a P0401.

Engine Performance Diagnostics chapter 24

Symptoms
- check engine light with EGR flow codes
- pinging/detonation problems at part throttle

Fix
- remove throttle body and clean intake passages

Tests shown
- how to test a Ford DPFE sensor
- how to test a Ford EVR solenoid
- how to force the EGR valve to open (flow test)
- how to test the computer driver for the EVR solenoid
- how to verify proper vacuum supply to the EVR and EGR

Tools used
- scan tool
- digital voltmeter
- hand vacuum pump
- test light

Playlist
- (Chapter 24) EGR Flow and System Tests
https://www.youtube.com/playlist?list=PLAFYVCyenqcrqfDNVnVxC_76uRT16Wjew

Related videos
- Ford EGR Flow Testing (P0401, P0402, P0405)
https://youtu.be/pH_kjRwD-Xw
- Ford EGR flow quick test (P0401) DPFE fault
https://youtu.be/rA5vX3Epe7w
- How to test an EGR DPFE sensor (EGR flow test) - Ford, Lincoln, Mercury https://youtu.be/GDfxNHsPLCU
- Ford Ranger EGR Flow Trouble Code P0401 (DPFE fault)
https://youtu.be/RUmH4lwTLKs

For more information on this topic, I have written a “field manual” called Engine Performance Diagnostics which is available at www.scannerdanner.com as an eBook or paper book.
Want even more diagnostic training? Whether you are a DIY trying to fix your own car, someone looking to become an auto technician, or a current auto technician that wants to get more into diagnostics, subscribe to ScannerDanner Premium https://www.scannerdanner.com/join-scannerdanner-premium.html There is a 14 day free trial.
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Disclaimer:
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