Knocking/loss in oil pressure
 

Had the coilpack on cylinder #1 replaced (and added heat tape) and 2 days later I heard knocking that went away as fast as it came. I had nowhere to pull off and it stopped, so I went another 1/4 mile and it came back w/an oil pressure light. Killed it and cleared it from the freeway (now off the entrance ramp so I had a shoulder). I know of the camshaft TSB, but this threw no codes until it happened, and I never checked them. I just got word of the following codes:
U0073 - Lack of communication between modules?
C1241 - Low voltage
C1201 - Brake control system turns off (explains why the TCS light blinked on the first time it started knocking)

Buddy thinks it may just have issues telling the injectors to fire (this did happen right about when the EFI would turn off, if I'm not mistaken (10 minutes after starting or so).

Thoughts?

If the coil pack job was done by the book they pulled the engine. Look for a loose connector anywhere in the engine bay. This includes ground straps. I've almost forgotten to latch the connectors on the DI controller. They can just slip loose.

Thank you, I'll check.

Brass in the filter, new (used) motor arrives on Tuesday, should have it back together Xmas weekend. Plugs looked fine, will pull apart once life calms down a bit and see if I can salvage the heads. Selling the car, though.

http://imgur.com/a/pGkrX

Using Imgur for the image and not working, anyone want to lmk where I'm going wrong?

http://imgur.com/a/pGkrX

I was data logging the last time my car threw a P0351 code at the track. Once the coilpack went bad, there was significant FLKC above 5500 RPM, in the range of -4 to -5 degrees. Wonder if that was what did your engine in (if you were pushing the car hard at the time).

Then I bet that's what happened. I wasn't flogging it, but it did see 6k+ a few times after the code. Son of a gun.