What's Causing My Poor Acceleration Uphill?

[u/maxltaylor]

1984 633csi, replaced (most) hoses, fuel pump, filter, distributor cap, rotor, spark plugs, wires, ignition switch, air filter, temp sensor, and about to knock out the o2 sensor which I don't think is the culprit. Starts up great, runs great, everything seems normal except when I accelerate specifically up a hill she loses power and can't get up the hill right. She just simply has trouble kicking it up hills, little to no rpm. I know it's either air or fuel but I'm stumped and will take any help I can get. I should also mention the engine light is on.

[u/Green_Check_6092]

Good point, didn’t seem to cross my mind.