I want to pipe in here a little bit..
On my 95, with the Wrist Pin wearing and causing some unwanted noise, the PCM would pull timing even when it was cold... It was killing off the timing as low as 2700-2800 Rpms.. Even after a cold start it was using the Knock sensors..
Now I also am in the frame of mind that there is a good possibility that he may be flowing more than the Stock tables can keep up with..
Go ahead and get that PCM swapped out from the other car into the current car and see what if any changes that may provide.. After all that swap is free..
If you still have the knock then you have to know if its false or real..
And on a cold start he is running rich... So again once warmed up it could leave the possibility that he is running lean and getting KR..
On my car which has the Ported Lower, Shaved Throttle Body, Plog on the front, Ported Mani on the rear and a High flow cat, along with an FWI... My fuel trims stayed quite close to what it was supposed to be... Even though I am flowing more than I did stock, I don't have a cam to bump the valve open further and for a longer duration..
I am watching this and paying attention for future tuning...
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