Car developed a strange KNOCK!

[pgriffith]

Well last night I installed the MiniAFC from ZZP. Got it tuned pretty well, O2's were running about 830-870 depending on RPM. It did take some work to get it that close. I had runs where I was really lean and others when I was really rich. Back and forth a few times. I wonder if this may have caused any damage to my engine. This knocking sound im not sure what it is and I havent had any time to troubleshoot it. It is sitting at home parked. I will look at it tonight but can you give me any ideas? I did notice while driving the knocking noise got worse. And my RPM's fall very very fast wich is not like my car at all. And I recently did a cam swap but its been running very smooth for about 2 weeks now. So Im not sure this knocking noise is even related.

Please help with any tips, ideas. I will post an update later after I get a chance to look at it some more.

[malloynx#2]

preston, are you saying you can hear something knock.. pop the hood and have someone rev the car while you pinpoint where the knock is coming from..... is everything tight?

[WickEdSix9838]

also, .83 is pretty lean...id run the 02's from .86-.89, it may be detonation if its too lean...

[Dominic]

Is this an april fools joke? Please say yes.

[pgriffith]

No sir. No joke. You know my situation and it is true. I am parting out the motor and doing a V8 swap.