Tony, thanks for all the detailed info! I really appreciate your time to put that together. I'll order the O2 sensor today and clean the MAF sensor tonight.
I haven't noticed either an exhaust or vacuum leak. When I first got the car there was a vacuum leak that was causing the heater to stick in the defrost position. The ford dealer replaced a bunch of lines and it has been great ever since.
The head gasket may be another story. I�ll have to check that out. Would the head gasket cause the oil consumption? If not, what points you to the head gasket? Is it the white smoke on a cold start?
Also, I found the codes from my first read. They are P0174, P0420, P0171, and P0156.
Thanks again. If anyone else has any more input, I�d love to hear it.
