jerk/buck

[P_A_B]

I'll check out that tool. And I did check the maf sensor and I did not see a jump in voltage

[Moyockman]

I had a similar problem, I got the impression that at higher speeds it would occasionally falter, an abrupt buck, the car seemed to have fine power 0-60 idled well but at 60 to 65 it would occasionally buck rather aggressively . It was almost as if the engine turned off for a split second. I suspected the Crank position sensor.

I made it to my first day at my new job and figured I would look into it when I got home. But alas when I went to start the car to go home for the night the car was dead.

Long and short of it, My fuel pump coincidentally died that day. Being away from home I had it towed to a shop and they replaced the pump. When the test drove it, they noticed the falter and replaced the crank position sensor.

a rare double failure.