Just noticed a slight surge in my idle. Was never there before. You can see it on the tach needle when you look closely. Anyway, I've always thought that a vacuum leak would be the problem, but couldnt locate any. I went over those vacuum hoses repeatedly and still nothing. No loss in engine performance when driving either. The engine is a 22RE rebuild with about 20K on it. I also checked for codes, and it isnt throwing any. Any ideas? Thanks in advance.