Help with Mu Hyunday Elantra 94

Hello that can help me I have a Hyunday Elantra 94 mechanic and it accelerates and decelerates for a few seconds after taking out the changes, you can get the new relay babble, and remain the same, in which it harms the car that accelerates and decelerates from now I appreciate your help, to Porsiaca I have the manuals of the Hyunday Elantra 94

This ocilacion can be for many things both the IAC, and the air filter, set up, fuel pump, the problem that to say with Seresa that it is one to listen oscillation but can it increase to the point that stops alone, but until this happens you can walk, how is your clutch?