car hesitates at about 2200 rpm's, any ideas why? Options

[95celigt]

It only does this when cruising at 2200 to 2500 rpm's in every gear. It's like a little jerk from the engine. I have replaced the plugs, wires, cap, and rotor and it din't solve the problem. I was thinking about trying the o2 sensor but at a $180.00 i dont want to replace it if it is fine. Any ideas would be alot of help. Thanks guys and gals.

[97GTinKC]

Check the numbers on your ecu, there is a tech bulletin about this eg009-97 which applies to certain model 5S-FE 5 SPD cars. may be others affected, I had that type trouble on my 97GT, took several months but I finally got Toyota to replace the ecu and that fixed it.
Symptoms were: anytime I was going downhill or on the level, and trying to maintain a steady speed, basically off-idle/no load, it would start bucking about once every second, the bulletin talks about a re-programmed fuel cut-off to "enhance driveability" . the computer kept trying to assume you were slowing down and it was shutting off the fuel too early.

go to alldata.com , look under recalls and tech bulletins, see if any apply to your car, if there is a bulletin that looks interesting, try going thru the public library internet to get details- they usually have subscriptions to all these interesting sites, or most garages have all tech bulletins on cd now, get them or the dealer to print out the details, I went thru all that, new plugs, wires, filters etc, only to find Toyota already knew they screwed up and didnt bother to recall it. replace it only if the customer complains loud enough. (I did)