I've had a bucking problem for a few months now, but it's ONLY when I let off the gas, mainly between 2-3K rpms. Could that still be the fuel pump? I have new plugs and wires. New fuel filter. The bucking gets REALLY bad when I take the O/D off. Makes a rumbling/burbling almost muted V8 w/ headers sound, but not quite, obviously (especially when going down a hill). Could this be the transmission? The fluid is a bit overdue to be changed. I had to wait for my tranny cooler and shift kit to get here. I can't figure it out. It did stall on me once when it was cold and I pulled out going uphill. Anyone else experience this?

02 Nissan Altima 3.5 SE, FULLY LOADED Old car- 99 SE Sport ATX w/ SVT body kit (for sale...asking $4,200 OBO), nicely modded, high-flow exhaust y-pipe back and KKM. 95K, but 95% are interstate highway miles back and forth to college everyday.