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3 weeks ago the cylinder head gasket was replaced in this vehicle by a mechanic at the cost of 1700$. now the truck has an idling problem that didnt exist before the head gasket repair. quite often the truck will not return to idle rpm's after it into neutral. rather the trucks idle sits at between 1500 and 2000 rpm's. sometime a quick rev of the engine helps return the idle to 1000 rpm's but most of the time the only thing that helps is to turn the truck off then back on...1997 chevy s10 2.2L 4 cyl manual transmission, 160,000 miles