2001_Ford_Explorer_Sport_Trac Wiki
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This 2001 Ford V6~4.0L~SOHC is factory fitted with the ExhaustGasRecirc\EGR system pictured below.

The ExhaustGasRecircValve, left side of IntakeManifold throat, is Vacuum actuated by the EGRSolenoid.

The EGRSolenoid, mounted near EGRValve, is a 12v VacRelay actuated by the PowerControlModul\PCM.

The DiffPresFlowElement allows calculation of Flow from ExhaustManifold to EGRValve to IntakeManifold.

The DPFElement, mounted on 2 RiserHoses+Tubes, sends DiffPressure to the PCM for calculating Flow.

Links To Related Info

Thanks go to the brave souls who've preceded me in similar adventures & freely shared their experience:

https://easyautodiagnostics.com/ford/4.6L-5.4L/how-to-test-the-egr-system-1 EGR Test
https://youtu.be/ihCmVYqk_lw?t=17 EGRValve Fix
https://youtu.be/HpmMa7z8NGo?t=8 EGRValve Mod
https://youtu.be/g3k8kuJ30UQ?t=17 DPFElement Fix
https://sporttrac.org/threads/rough-idle.123230/#post-1043831 DPFElement Fix
https://web.archive.org/web/20210131201728if_/http://www.explorerforum.com/forums/threads/egr-hose-replacement.491232 DPFE Hose Fix
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