Did tune up,water pump, feel pro headgaskets, feelpro intake manifold gaskets (the better ones), ngk plugs, autolight wires, cap rotor. no matter what i do it gets 17mpg. i've had this thing for years put maintenance in it just looking for better solutions. if i had an injector manifold i could get some bosch core injectors and lean my cruising and idle a/f out more and see hopefully 4-7mpg pick up.