Anyone got any advice? I’ve got a 2001 Explorer (w/ 95000 miles) that stalls slightly while idling at the stoplight. My first guess was the fuel filter so I changed this. NOPE! Next, I thought that it might have been some carbon buildup in the IAC valve so I took it off and used some non-chlorinated brake cleaner to clean inside of this valve. Two days later, I noticed that this didn’t do it either. I next tried to change the PCV valve for the first time. I pulled off a couple of hoses from the intake manifold searching for the PCV valve before finding it at the very back of the manifold. After finding it, the original looked good but I replaced it anyway. Now the check engine light is coming on b/c of an “EGR insufficient flow detected” (P0401). I tried resetting it by unhooking the battery but it keeps coming back on. Any suggestions on how to resolve this w/o taking it back and forth to the dealership?

johnnyboy

 

I had the same issue (check enine light, rough idle, and stalling) with my 2001 Explorer Sport. Had about 105,000 miles at the time. Turned out to be a bad Differential Pressure Feedback EGR sensor (DPFE).

Hope this is helpful.

 

YEP , BINGO , you go, atvar2003,[sm=exactly.gif]

 

Thanks, atvar2003, I will try this. It has got to be cheaper than going back and forth to the dealership.

 

dpfe sensor fills with water hence the insufficient flow part very common ford problem