Having problems with your 1998 Ford Expedition ?
Check Engine Light
\015 What do codes PO171 and PO174 mean?\015
I had the exact same codes on my 2000 Navigator with a 5.4L eng just today. It was a vacuum on the top of the motor. The hose had deteriorated and caused an associated hissing sound and rough idle. Used a little duct tape, ops check good, no return faults.
My steering column is no good
Repair Help & Product Troubleshooting for 1998 Ford Expedition
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