** We will be closed for our annual summer break from Friday, June 14th through Monday, June 24th. Our shop will be closed during this time, so no support or shipping will be available. **

Knock Sensor Feedback and Detonation - Disable the Knock Sensor on OBD1 ECU's

The factory OBD1 Honda/Acura knock sensor was designed to detect engine knock/detonation, and then retard timing when it is occuring to protect the engine.

Unfortunately, the stock knock sensor board on OBD1 ECU's does not interpret knock sensor feedback very well. In fact, it often interprets engine background noise on built engines (from piston noise, noisy valvetrain, etc.) as knock, thus retarding timing when unneccesary. In addition, it often does not detect knock at high rpm when it is actually occurring, right when the engine is most susceptible to damage from detonation. If the tuner has tuned the engine relying on knock detection to retard timing, the knock may not be "seen" at times and result in detonation/pinging.

For these reasons, we recommend ALL OBD1 ECU setups have the knock sensor disabled, regardless of whether or not you are using an ECU that has a knock board (ie: P30, P72). The tuner should "listen" for pinging, as well as periodically check the spark plugs for signs of detonation while tuning the engine to avoid detonation.

Net Orders Checkout

Item Price Qty Total
Subtotal $0.00

Shipping Address

Shipping Methods