e30 m50v car was running great threw a code for purge valve and oxygen sensor. so i changed the o2 sensor and i dont have a purge valve. problem went away for about a day and a half and is now back so when im in high rpm the car strugles through the power band almost as if its not getting any fuel i let off the throttle and it clears up only to stumble and cut out again. having problems pinpointing whats going on
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