The Fiero used a slightly different engine, then the citation or even the celebrity. the camaro motor is the closest relative from my reads.
Car has been driving us crazy, but we think we have found the issue: leaky injectors. Plugs are fouling and exhaust is black. After replacing plugs, wires, cap/rotor, O2 sensor, and checking MAP sensor.
A recent “kill” up at the U Pull it lot with hopefully get us all the parts we need.