Sorry I did get back I have a hard time getting in too the forum.
I have replace the cat and o2 sensor, all the injectors, 10,000 on new plugs and wires, cleaned the throttle plate and change at fluid 25,000 ago and did intake and valve gaskets. The tires I run on the hard side. There are no code on the car. I did my testing at 55 on a straight road that is fairly flat.