I just recently picked up a '94 Cavalier RS, it has the 3.1 V6 with a 5 speed. Now all is good, car runs well, only one thing bothers me, deceleration. When i'm COMPLETELY off the throttle the car seem kinda boggy, like it doesn't deccelerate steady, it's kinda bumpy...the clutch is all good. A friend said perhaps vacuum, so i plan to check that soon, it could even be the air filter, i never checked that. But if it's not vacuum or air related, any ideas? The car runs WELL under even the lowest of throttle to WOT, just under no throttle it seems hesitant or something.

Thank you.