i just picked up a 93 coupe with a b18a1 in it and i pulled the code and its code 3 Manifold Absolute Pressure thing i dont no where to start to fix the problem also idk if its related but the car brakes up at high rpms and the idel jumps and i get horrible gas mileage only gets 17 with a ls tranny any help would be great also a vacuum hose diagram would be great
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