In a hot rod. Frpp controls pack Gen 2. CMCV'S disconnected and tied open. Factory mass air meter in place just hanging. No air filter. 4 unused vacuum ports plugged (the evap canister purge point, the empty point in TB that went to the cmcv's, the old sound tube point and the empty vac point on outside of the elbow inlet to TB).
Car starts and idles fine. Get going and does OK and very small throttle inputs. Try to be more aggressive and it starts cutting up. Like at about 1/4 throttle. Almost sounds like running on half-6 of the cylinders. Back off and smooths out. Only got up to 20 mph or so. The check engine light is not on.
Any insight? Ford says its the lack of inlet box and air filter. Could it be? Not sure I have room to attach it to test. I'm also going to double check my plugs in the vac fittings. But quick check says they OK.