My Acura MDX has been hesitating and being a dog on the highway. Get on the skinny pedal and it seemed to take a few seconds to get up to speed and when I let off, it would start to jerk a bit.

Changed out my plugs under advisement from a technician I know.

Took it for a boot on the highway after the new plugs went in and I have to say what a difference. No more hesitation and jerking, even the idle is smooth again with no surge every so often.

I was shocked to see that two plugs were not even hand tight.