Just a quick check as this may be related to the slightly discomfortable smell coming from the engine.
Is that a breather port ? Im assuming it should be covered cause its caked in grime all around that area.
Also talked with agile and they said the same thing you guys did. No need to detune the car or swap back to stock stuff,i should be getting better fuel mileage than stock. They just said something is severely wrong. Vaccum leak. Fuel leak. Faulty 02,fuel connection leak etc etc. I guess i just need to run it down and tear the car apart.