The idle is smooth most of the time, but choppy others. It's been like that since I got the car. Seems to be choppy when it's warmed up after driving for awhile. Say I make a long drive on the interstate, stop to get food, restart, it's choppy. I've rebuilt the engine from the head gaskets up, and it's still the same. I have given up on that tbh.
I'll check out that pipe again. Last time I checked over it the best I could and it seemed fine, but I might just have to pull it off the car and look at it in my hand.
Wouldn't a stuck open EGR due to being carboned up cause what is essentially a vacuum leak?
