Engine Performance problem
1999 Ford Taurus Front Wheel Drive Automatic
my 99 taurus, 3.0L, entech DOHC, developed a rough idle, service engine light is on.
Low mileage (88,900), very clean, nothing obvious wrong.
Any diagnostic suggestions appreciated.
Had the controller scanned and have 2 codes;
P0171 System too lean (Bank 1)
P0174 System too lean (Bank 2)
Air leak? Gasket? Vacuum leak? Dirty throttle body?
Ideas on where to go from here much appreciated!
Tuesday, March 4th, 2008 AT 6:56 PM