Here is some background to my problem- Car sat for just a little over a month I put a new clutch/trans/flywheel insert in did an oil change and she ran great for the whole day. The next morning on my way to work it kept dying randomly following a massive missfire(po300 random missfire). I tested the coils/icm and found the ICM to be bad and also the coils 1/3 to be bad. I replaced them both and the car was fine for a couple days. It has started acting up again this time with po301 cylinder 1 misfire. I have tested the icm/coil, tested the injector, new OEM plugs, tested the crank sensor, did a compression test and cylinder leakdown test, fuel pump/pressure, o2 sensors. Im a little stumped right now has anyone ran into this problem and cant find the cause for the misfire/stall?

Describe how you did each test.

Do you have access to a scan tool? Also, does the misfire seem constant, or every once in a while/under load ETC.

Yes i have a scope for testing sensors and tech 2 for scanner

It turned out to be a ground that would open when moved,