Issues With... Something o.o

[Obscure-Amnesia]

i've searched around a bit here on the forums, reading about peoples fuel injector problems, but i haven't been able to come to a conclusion about whats going wrong with my car...

my car (91 Corsair, ca2oe) is doing some funky stuff. it's jerking around when i don't accelerate, or if i keep my acceleration constant. it happens at low and high revvs and almost feels like it's going to back fire. there is no smoke, and about 4 days ago i put some injector cleaner in the system (a few people suggested i should do it), but it hasn't helped the problem any.
it's idling horribly unless the choke is on or it's reasonably warm (like, after a 20 minute run), whilst idiling, every 10 or so seconds its revvs drop so low it almost stalls.

i've recently had some of the O2 sensors replaced and i think the air flow meter got replaced as well.

i'm really sorry if something like this has been asked before, but i couldn't find anything. please help me 

[chr1S]

choke ? err...i dont think your car has a choke

[LC_TRX]

if it happened immediatley after the replecements of the air flow meter and O2 sensor then id be checking to make sure that they are all still in good condition (i.e that they werent damaged when they were getting installed) other than that check to see if there are any leaks or gaps in the itake system which will cause an incorrect reading in the AFM.

this may help http://www.antrx.com/smf/index.php?topic=13151.0

[u12-910]

check your vaccuum lines and make sure there all connected.  may need a new fuel filter aswell.

[Obscure-Amnesia]

thanks guys, problem isn't solved yet, but it's given me a few ideas on what to look for. just gotta wait till i get some time off to have a look