weird sputtering
 

ive been having a problem lately that seems to happen at random. ill be driving and the car will be running great then it will loose power as if it stalled but it wont die. it will just idle and if u give it gas it will sputter and rev as if it was low of fuel. so i pull over and it will sit there and idle perfectly, with your foot off the pedal, but wont rev with any thottle. then i turn off the ignition and restart it and it takes off like nothing happened.
i cant figure this one out

rx7 89 convertible
new O2 sensor
i currently have a bottle of injector cleaner in the tank
i have it all back to stock

its probably the injector cleaners getting rid of the nasty stuff in your engine. it would do the exact same thing to me on my 240 when i put it in.