TWcherokee93

Hey all, I have a issue on my 94 xj country. It gives me a 24 alarm and a 21 alarm. Thats the tps voltage and the o2 voltage alarm. Replaced both. Still get it sometimes, not all the time. Rpms jump and drop when sitting and idling, have not had it do that for a day or so. Did the computer need to reset? sometimes it jerks when just driving down the road. It runs good otherwise. Any advice?

Thanks