If you have fuel pressure to the throttle body injectors, either there is a wiring issue, or the ECM has failed. Each fuel injector is a solenoid-operated device controlled by the ECM. If you look below, you'll see that the ECM is what controls the injectors.
First, check the inj A fuse. See pic 2 for the location. When you check the fuse, also confirm there is power to and from it.
Here is a link that you may find helpful:
Next, I would recommend checking for diagnostic trouble codes. The truck has an OBD1 system that doesn't require a scan tool to get codes. All you need is a short jumper wire or even a paper clip.
Follow the directions in this link:
Let me know what you find.
See pics below.
Images (Click to enlarge)
Tuesday, January 17th, 2023 AT 8:13 PM