Two days ago, my wagon became slow to accelerate. I'm pushing down the pedal, but it's just barely gaining speed. This is different than last time, when we had a transmission fluid problem, and the car would not find the gear to move up in speeds. This time, the car is changing gears smoothly enough, but it's not moving very fast. It aslo shakes a bit when idling. Is this a spark plug problem? This is our theory, but if you have any other suggestions, I'd love to hear them.
Thanks, Eleanor