stable you ask? = engine is the stable , cause there is so many horses in there.

my car has been stalling out , also at times its very sluggish and wont travel over 5 mph , no matter if i put the pedal to the floor. the code i get is bad 02 , however after a inspection i noticed the 02 sensor's look to be new. (used car) perhaps they did not use dealer 02's? would this be a problem? my service light stays on and at times it flashes.

03 concorde 3.5 no high output