i have a 1989 vw cabriolet, my problem is losses power, cold, the car start fine. take off rightaway, everything is fine. after a few minutes come to a red light come to stop i start to notice a sputter on acceleration. after a few more minutes after stopping, the sputter gets worse. goes away after 2500- 3500 rpms but seems to get worse when car gets up to temp. any ideas? thanx