I'm currently having a cel for code71. The car seem to run fine ith it on but I wanted to fix it so I cleaned the egr valve and modulator. Now my car runs horrible.The idle is fine but now the engine shakes. Also, I have loss of power after 40mph. I have to almost wot it to get it up to freeway speed.

Does this sound like a stuck valve or something else. Vacuum leak? I'm sure the hoses are all placed where they're suppose to. I will buy a vacuum pump soon to test it but would like to get your guys take in this. Thanks.