ok. so I just finished testing the EGR Valve.
I placed a vacuum pump on it, zero vacuum while idling. check
Put 10in of vacuum, car stumbled - did not die, no loss in vacuum. constant stumble. check.
Released vacuum. Gauge went back to 0. Car idled fine.
Car did stumble a bit with no vacuum - gauge did not move when this happened. My mechanic says to replace the DPFE. He says its 98% that its the DPFE Sensor as its a VERY common problem with Fords in general he stated.
Took the DPFE Sensor off - about 20 minutes total time including diagnostics. Not as bad as I thought.
The DPFE Sensor casing is corroded - pieces of it are falling off with my fingers.
Anyway - I'm ordering the DPFE Sensor - What are your thoughts on my findings today with the vacuum gauge.
PS - All vacuum lines seemed fine. I couldn't find any cracks or anything.
Thanks
