Fuel pressure question

[SilverSN95]

First symptom is the pump has the typical buzz to it but it seems to be a little louder lately.

Second is the slight detonation I experience under the following:
1. warm ambient temperature, with and without the a/c on
2. only under load above 2500 rpm and only in 2nd gear and above. never seen to get it in 1st.
3. engine has heat soaked after a drive.
It doesn't happen when the engine is cold

I've tried to run the codes but I'm not sure if I'm doing it correctly. With the KOEO test I get either code 111 or 33 depending on how you interpret the light. It means either there is nothing wrong or my EGR valve is screwed. I have not done the KOER test yet.

Also, my timing is at 10 degrees and I have Autolight 24's installed along with new wires,cap&rotor.

If I run 94 octane the detonation goes away.