Tac Map Mike
Newbie
I’m chasing a terribly rough idle. 1991 5.7 tbi 2wd. New plugs, wires, cap, and rotor. Was going to pull the Egr off to clean and or replace it. I noticed there is a line going to the Egr and then an open hole where there should be a vacuum line? Where does it go and could this cause my rough idle
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