CTRFIRE:
You may need to pick up a reprogrammer for your computer. There are several threads on this subject. The knocking can be fixed.
BTW, ignore what I said about the rears not spinning. Went to the track and generated smoke from all four on the last two runs of the evening. Do not ask what it ran. I was a solid .5 off what it should run. LPE is flying a tech out Nov. 17 and he is staying until the 19th to fix it. That is what I call service.
Black Lingenfelter Lux