Originally Posted by IceY2K1

Again, does the J&S directly via ignition pulses control timing or indirectly via tricking the ECU by causing a knock signal on the "tapped" knock sensor wire?

Originally Posted by sx7r

it'd have to be directly, otherwise how would the "retard individual cylinders" function work? If it was just tricking the ECU, it'd be alot easier to install as you wouldn't need to intercept ignition signals.

Originally Posted by IceY2K1

John,

You said the factory ECU will retard at high rpm/noisy instances, so why not eliminate that connection and just use the FACTORY knock sensor in the factory location for the J&S?

I understand about knock sensors being tuned to a particular frequency for a particular engine. No, need for another one besides stock.

Again, does the J&S directly via ignition pulses control timing or indirectly via tricking the ECU by causing a knock signal on the "tapped" knock sensor wire?