Need help from the DSM pros

I don’t know much about anything previous to my brother getting it. The maf was on the list of things to check. I believe he did plugs wires, etc but I’m not 100% sure. There is a vac leak that he fixed before he went back to school but we don’t think that was it. From what I’ve heard (I have not seen the car run yet) it idles fine but just doesn’t like to rev up at all. Supposedly he has sea-foamed and changed the gas, but I dont know if he just sea-foamed the gas or if he ran it through the throttle body / engine. He says it is throwing codes but I hae no idea what codes they are.

I didn’t even think of that… even though I had that exact thing happen to me when I had my 87 RX7. Stalled right out on the bridge from Troy into Watervliet and had no power breaks all the way down the bridge.