When taking off and going through the gears the engine runs kind of rough until it reaches a certain rpm then smooths out. It will also smooth out if I floor it while it is rough. I changed the plugs and fuel filter,but not the wires yet. Any ideas? Could it be the throttle position switch?

Thanks

 

maybe you didnt change the plugs right i didnt and had the same thing happen... your lucky you only have 4 plugs -.- ive got 8.

 

Mine has 8 also. It was doing it before I changed them. Before I changed them, It would barely pull itself on the highway. I also changed the O2 sensor. Here's what the old plugs looked like. Driver side on the right. #1 cylinder closest to the camera. It's not the best picture but you get an idea
of why it ran so badly.

 

Those look horrible!!

 

Should use copper plugs ... it will last longer.