Major injector/ECU/fuel problems

[Spacecataz]

Sudden undrivably rough idle, stalling and a long story

1996 / 2.2 L4 / 186k / Upper engine rebuild 30k ago Car was driven on a errand by my mother. Upon trying to leave for home, the car started running very rough, and stalling. From the description she gave on the phone, it sounded like a plugged up exhaust. I told her to get some fresh gas and ease it home after. When I checked the car for codes, I got 2. A P0300 and a P0122. Okay, so the throttle position switch has taken a dump, that’s easy enough. The car has 186k miles, but my constant nanny…

You guys were awesome with this problem, maybe you can help me with my main one?