My starter even with a new battery seems to be weak. It rolls over the engine ok, enough to start it, but it just sounds like it is running off of a half dead battery when it rolls over the engine. Is it just me thinking it is weak or should it sound strong with a fully charged battery? Would a weak solonoid cause the starter to roll the engine slower than it really should be? My engine is a 1978 2.5L 4cyl.