so i'm thinking about adding a short ram air intake and a throttle body spacer on my 01 pt cruiser so i can get over that 30mpg lump i've been trying to get over will this help
No.
Your problem is not the engine it is much more likely your driving habits, in addition to good general maintainance - oil changes and maintaining tire pressure if you adopt hypermileing driving habits you can easily get over 40 MPG with that car.
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