ok so the line that goes to the egr has no vacuum. the rest of my system has vacuum so i pluged a working line to my egr to see if it works and it does. i didn't see any hole or blockage in the egr's vacuum line. what should i do now?
Lets start over.tell me what yr ur car is engine type and how you did ur koeo test and who told u what code stood 4.my book is 3thousand pages thick but 1 page missing koeo codes i did a search and found different description