OK....so I am getting a pathetic 150 miles from a tank. Help me figue out what order to do suff to get a bit more milage. It has a new filter, plugs and wires are newer. Th EGR is making the check engine light on, so I assume I need to clean that thing up first. The Cats don't sound clogged at all, and the exhaust is new. I drive pretty conservatively, so what kind of milage can expect from a full tank? 94 FYI...and I seriously need to order a FSM from somewhere.