idle air control & egr valve
 

Ive got a 96 Eclipse GS with a 2.0 non turbo. The engine started to surge yesterday after driving for a little while. It threw up the CEL code for Egr valve so I replaced it this morning. Bought the Delphi part from Summit. Took it for a test drive and it did okay but then started to cut off on my every couple minutes. Driving or stopped.when I gave it gas it sounded like it was running on 2 cylinders. It also threw up the code for idle air control valve this morning. Ive already put 3 new ones in, so whats my problem? Thanks in advance.