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If there is a surging idle after coolant stop leak. Very good chance it clogged the small rubber coolant line going into the intake. Hope it helps someone, it was hard earned after individual component (egr, tps ect.) testing and vacuum line replacement.

Got it, clogged coolant line to manifold..damnest thing.

Georgia pass- continental devide

Has anyone had a surging idle issue that driven them almost out of thier mind?