2000 chevy Impala surging, whats wrong?

James

New member
2000 chevy impala ls 3.8 liter engine
recent tune up and trany job,
127000 miles
cleaned the maf
recently my car has started surging. starting around 35 mph or so the tach begins to jump and fall and the car seems to lurch and chug. i cleaned the maf and it seemed to get alittle better but quickly came back.
 
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