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FixIt - thanks The Haynes manuel (sorry, it's the only book I have) shows a DPFE sensor mounted to the side of a valve cover behond the oil dip stick tube. I just looked w/ a flashlight and didn't see it with an initial glance. Can you point me to where it is located on the 5.0 on a 1998...

CEL comes on with code P0401 "exhaust gas recirculation flow insufficient detected" This is on a '98 Mercury Mountaineer 5.0 2WD w/ 99,300 miles. A few months ago I replaced the EGR valve and the light came on within a day or two of driving - I assumed that I just needed to have the code...

I'm going to recheck the vacuum lines on Thur and the weekend, lack of daylight in the evening makes it tough after work. I already disconnected the battery for about fifteen minutes to reset, no help. I'm 100% positive I did not rotate the drive unit. Never even touched the hold down...

Wife's car is a '98 Mercury Mountaineer 5.0 2WD. The car began exibiting the 'chirp' coming from the front of the engine. Appeared to be the drive unit for the cam position sensor. Based upon a comment here, I decided to try a stop gap by pulling the sensor and spraying white lythium...