97 4x4 4 cylinder manual trans. 177,000 miles. recently i have a loss of power. changed fuel and air filter, ran a can of sea foam in it, no change. if its in nuetral and floor it it just sputters, going up hill it is horrible, the motor revs up to 55 or 60 mph but it cant go, got to let off gas and gear way down. it does have an exhaust leak on the right side of the motor. could that make it lose that much power? need ideas before i take it to a mechanic.
any ideas appreciated greatly