Hi! Was that a fix by replacing ICM? Did it ever come back? keeping me in suspense. I have something similar like that. Scoped CKP , CMP, Fuel pressure as well. Drop voltage 12 volt red wire had voltage. Ground wire checks out good, but when i scope it i have erratic 6 volt spikes while it runs and then after a while it disappears. When it acts up i scope the CMP and i don't get a signal. Then if i give it some throttle while cranking and keep it steady vehicle stays running and i get a CMP signal. I am wanting to really replace that ICM.

Eli Nambo
Shop Foreman/Technician
DE Medlock Auto & Cycle LLC
Odessa, Texas, USA