[FIXED] 87 Ford Ranger-Bad ECU Outputs, Spark KOEO

I'm dealing with my dad's 87 Ford Ranger 2.9 with an inline and in-tank fuel pumps . It buckles and then stalls. It's intermittent.
-Weather/temp seems to not be a factor. It is intermittent.
-With KOEO, I can hear various relays clicking at random times. This is what causes the bucking/stalling w/KOER.
-Fuel Pump Relay grnd control circuit drops in/out while 12v feed remains steady.
-With KOEO, fuel pump relay grnd control circuit does not deactivate after 2 sec prime. Because of this, FP runs w/KOEO at all times. Unplugging the FP relay deactivates pump. This grnd circuit has a timing device in the ECU, but it's not doing its job.
-Power Relay circuits do not drop out, but it is controlled by a 12v ignition feed rather than by the ECU (interesting).
-W/KOEO, when the relays start to drop out/click, it also produces spark. Yes, spark w/KOEO. This vehicle has a distributor with an ICM. It has an input called a "PIP" or Profile Ign Pickup, which is basically a CKP sensor. ECU receives PIP input, and sends a "Spout" or Spark Out output back to ICM for spark.
-Scoped both PIP and Spout signals w/long time base since it's intermittent. Caught both circuits spike during intermittent issue, and dropouts can be also seen within the waveform.
-Unplugged the ICM while relays were dropping out. It stopped sparking but relays kept dropping out.
-Placed a 2ndary ign probe on the ign coil during a test drive. As the vehicle began to buckle, I saw a mess of ign waveforms breaking up.
-W/KOEO, I did ECU circuit ground and power voltage drop tests. Main grounds did show a 300mV drop but not sure if that's enough to cause issues.
-Did grnd voltage drop of Fuel Pump Relay grnd control circuit directly from ECU (from pin to battery neg). It showed 800mV w/KOEO and KOER. Remember that this is the circuit that deactivates FP relay grnd circuit after 2sec w/KOEO, but it's not working
-I thought I had a shorted wire but the vehicle can be left sitting untouched w/KOEO and still have random relay dropouts.

I'm very close to calling the ECU but I want check for shorted solenoids. Want to also try to jump a ground wire to the main grounds that measured 300mV in voltage drop. Would appreciate any input from experienced techs out there.

So the fuel pump stays on key on engine off? If ya don’t have a shorted control wire from ecm to relay I’d swap out the relay for fuel pump if it still does it I’d call pcm. I’ve seen the old aerostars do the same thing

Battery voltage was low when I did ECU power/grnd voltage drop tests. Charged it, re-did voltage drops tests. All checked out (all grnds no more than 100mV) Checked for shorts from ECU harness. None found. Scoped injector pulse. Injector driver ground measured 800mV and peaking at 36.0v. Removed Fuel Pump Relay, and still randomly loosing its grnd control. Scope did not show any power feed drop outs on Ign or ECU circuits during symptoms. Considering all tests and symptoms, I felt confident enough to call the ECU bad. Replaced it and drivability issues are now gone.