Vacuum leak is a concern when the idle rises and falls, any foam or bubles in the radiator? Get a can of spray gumout, spray around the intake manifold and vac lines, if the idle increases you found a leak, any whit smoke comming out of the exhaust? If so you may have a head gasket or warped head problem. See about getting a compression and block test.
Saturday, November 17th, 2007 AT 8:16 AM