12b. Injection Pressure Regulator Test: Purpose: Notes
WARNING: This page is about a different car, the 2009 Ford RV Cutaway, 2009 Ford Econoline, 2009 Ford E450 Super Duty, and 2009 Ford Cutaway. However, it is still accessible from the selected car via links, so may be relevant.
The purpose of this test is to determine if idle stability or low power is caused by a stuck or dirty IPR.