in 2nd and 3rd, between 2500 and 3000 rpm, the car under acceleration moves/hesitates/jerks for 2-3 seconds, almost like the old carburetor cars when they needed adjustment. Did the top manifold carbon deposit clean out, no change. Dealer says it's not the tranny as no codes show up on diagnostis. He says I may be pumping bad gas at Wal-Mart, I use 93 octane and it's Murphy Oil, how bad can it be!
I am ready to trade the car due to the tranny risk but at 80K miles, this 2001CL-S doesn't look ready yet.
Any ideas what it could be?

 

could be iacv. mine does the same but i have 6spd