So my check engine light came on. I did the diag. and it is saying EGR. I have been wanting to block off the EGR, has anybody done this. Also, when i replaced the TVV and fired it up it idled like crap. I unplugged one of the vacuum lines and it idled great. It was the vacuum line that is in the cluster of 3 lines that is toward the back of the intake (right underneath the crankcase breather)