z281997

Watsup guys im new to this but I have a problem I have a97 z28 lt1 with a bit of an emission problem. When I turn on the car the idle kind of throws off but then is steady, also my gas cap when I remove it it doesnt release pressure I changed the cap n still no bueno. Scanner says its egr and the catalitic malfunction. Im losing power it hestitated a few times wen I take off and it really is a problem I jus was wondering how to replace egr valve with out droppin the engine any tips? Thank u

Sent from my SGH-M919 using Tapatalk