7.4 454 won't start

[Isaabalot]

I have a 94 winnebego motorhome with a chevy 454 TBI ECM 16196395 PCM. I drove it up to my house and it ran fine. Then later in the day I went to start it and it cranks but won't start. I popped the engine cover off and I can see the injectors are not firing. I sprayed carb cleaner in the throttle body and I can get it to start.

I found the pinouts for the different ecm that says it works 16197427 on this forum. I checked for power and ground on all wires I could identify with power or ignition. I checked all fuses and pulled fuse box out and checked all connections behind with a power probe. (History of poor connection at ecm fuse).
I cracked the fuel line loose and turned the key to on. Fuel does spray out. (updated: checked f15, e15 ignition feeds, e16 battery, a1, a2, b4, b3 grounds all good.)

I bought a new ignition control module since it was cheap, no change.
I still have spark. No fuel injectors. I verified power at the supply wires on the injectors. I do have constant power.

I replaced the ECM because it was cheap and swapped the prom over. I was told by one of those online help justanswersrv the ecm was probably bad/injector driver failed.

I'm at a loss where to test next. I don't know what order to test anything else in. I'm wondering if I should try a pinout of the 16196395 ecm since I just found it. But I believe it is the same.

Please help! It is a 34foot motorhome blocking the driveway. lol