I just finished putting a rebuilt engine in a '91 Blazer and came across a connector that was not connected to anything. Come to find out this was not the first time this engine was replaced in this vehicle. I finally got a chance to look under the hood of another '91 and found out that I am missing a knock sensor (I think) that is mounted on top and on the back of the motor near the bell housing. The new engine seems to be running very well and no knocking. The owner/driver of the vehicle is NOT a lead foot (quite the opposite) so I am wondering if it is worth the trouble and expense to even bother with installing this sensor.
Any comments?
Tim