« on: Feb 12, 2012, 05:08:46 PM »
22RE's use it. Senses engine knock like from bad gas or too much timing advance. ECM will then retard ignition timing. Mine will give a code and check engine light comes on.
Usually screws into a threaded hole in block near oil pressure sender.
![](https://board.marlincrawler.com/Themes/MCI_V3C/images/ip.gif)
Logged
88 Pickup SAS'd, 3.4 V6, R151F Hybrid, Dual Ultimate, Triple sticks, 35's, 5.29's, HP front, V6 rear, Aussies, 63" Chevs, Anti Wrap Bar, Warn 8274 on Home Built Bumper
4WU linked 86 Xtra Cab build in progress