knock sensor help?
Thread Starter
Instructor
Joined: Apr 2008
Posts: 153
Likes: 0
From: Cincinnati Ohio
knock sensor help?
I recently put an LS2 block in my 2001 Zo6. Instead of drilling and tapping the block to use my old knock sensors, I bought the casper harness with a two wire and one ground per sensor setup and some factory LS2 knock sensors. Already figured out that casper has the cam sensor wires reversed, but I cannot get these knock sensors to read correctly. Pretty sure they are causing my timing to retard at w.o.t. Anybody know how to test the sensors?
Le Mans Master
Joined: Aug 2005
Posts: 5,375
Likes: 326
From: CA.
St. Jude Donor '13-'14-'15
Pretty tough to test them--But--you can see if you are getting any knock retard by using a data logger or scanner--If you are getting some knock retard--them I would say they are working---However the 2 different types of sensors you have--- both have different values in the knock retard tables--The Z06 KR tables are different than the LS2 tables because they are using different sensors--You can reprogram the ECM to be more sensitive or less sensitive--The only drawback is that the only way to tell which way to go is with your own ears wether or not the engine is pinging--
Some years for example have overly sensitive KR tables--My '98 continually was showing 4-5 degress of retard with only 20 degress total dialed in ---couldn't hear any audible pinging--So i de-sensitized them a bit and it all went away--Only once in awhile I'll get 1- to 1.5 * of KR---AND it really woke the car up !! Visual inspection of the plugs show no signs of pinging or aluminum flaking--
Some years for example have overly sensitive KR tables--My '98 continually was showing 4-5 degress of retard with only 20 degress total dialed in ---couldn't hear any audible pinging--So i de-sensitized them a bit and it all went away--Only once in awhile I'll get 1- to 1.5 * of KR---AND it really woke the car up !! Visual inspection of the plugs show no signs of pinging or aluminum flaking--
