29 Degrees of timing at idle?? Could fuel overrun cause this?

[phunny]

I bought this car modded already, and I finally replaced the knock sensor and can get timing, but now I can't get any more than 8 degrees in the higher rpms. When I bought it he wasn't sure what fuel pump was on it. Would a 255lph overrunning my regulator cause something like this?
thx, charlie

 

[FourG63 97GST]

maybe u over torque the knock sensor making it more sensitive to knock, hence the lower timing, what kind of timing you were getting before you replaced it?

 

[phunny]

Base timing was the same as now, but higher rpms went to zero.