This adapter makes checking fuel pressure much easier.
Puedes encontrar este tutorial en Español aquí: Cómo Probar La Válvula EGR, el Sensor DPFE, y el Solenoide de Vacío de Ford (at: ).
Once you start testing, I recommend you start from TEST 1 and go from there.
This ‘How To Test’ article covers three different types of Ford EGR DPFE Sensors and below you'll find important info that'll help you to successfully troubleshoot/diagnose the EGR valve code that is lighting up your check engine light.
You'll find step by step instructions on how to test: You don't need expensive testing equipment to do it and more importantly, with this article you'll be able to find out exactly what part (of the entire system) is bad and needs to be replaced and in the process saving time and money. Testing the EGR system on your Ford, Mercury, or Lincoln car or truck is a pretty easy affair.