I am going to be doing the resistor thing to desensitize my knock sensor. Because Im pretty sure my rockers are messing w/ it.

I plan to do this:
http://www.charm.net/~mchaney/knock.gif

Has anyone else done this? Is it effective? Will it still pick up some real knock?

 

100% effective and no it won't pick up any knock,but thats not a problem if ya are running 93 octane.

 

won't pick up any knock whatsoever, or just false knock?

also, Jazsun, do you have the stock knock module or the lt4?

 

LT4 or 1 won't fix it,but the resistor will.

 

You cant use the LT4 knock module in a 93, only 94+. I would try to find out what is causing the knock, it may be real knock. Alot of people are running RR's and are having no knock. I am on my car and I see very little knock if any. I wouldn't go desensitizing it if your not sure it is rea or false knock. You may end up damaging you motor.

Are you running 93 octane?

 

Can a tapping lifter cause false knock?

 

Have 95 Z28 going to Headers and RR's , like idea of inline-resistor.
Could you be more specific and give me a part number and/or store
like Radio-shack. I really do not understand how to determine what to get
from above info....Thanks

 

Do a board search and archives. There are facts and instructions in a lot of post's from a year or so ago.
I posted about using a 2 position switch that one side was looped inside to the dash and to the computer as stock.Flip the switch and it is looped to the resistor.
Hook both ends of one side from the switch to the wire going to the computer.Hook the other two ends from the switch(one wire has resistor in it) to the knock sender.

 

This is how I did it. It works all the time. Only reduces by 25%. Safer then not running one.http://falklands.globat.com/~fullthr...nocksensor.JPG

 

Why not just do it through tuning if you have TC/LT1Edit? Cant you desensatize it or completelly turn it off through tuning?

 

Thanks guys for all the info, I will do the search, and look at the
other ideas. .....Thanks.....Theo

 

Any of you guys get SES lights when your knock retard hits 8-12*? The only code I am getting is 43 (knock sensor or circuit). However, the SES light is very intermittent and tempermental. I don't think there is a way that sometimes it works and sometimes it doesn't. Anyway, the engine runs rough whenever the SES light comes on for code 43. Is it running rough because the timing is being retarded so much?

 

I dont tink that will work for a 93' tho.

 

It should. Why not? 93-94 same knock sensor.

 

I think we've been through this several times. DTC 43 simply checks the voltage in the knock sensor circuit.... this isn't something we are pulling out of our a$$, its straight from the GM manual. Volts over 3.5 or under 1.5 for more than 1/2-second, and you get the code. You've got the sequence backwards..... intermittent circuit on the knock sensor does three things.... 1) sets DTC 43, 2) turns on SES light, 3) PCM defaults to a calculated, variable value for knock retard, ranging anywhere from 0-15degrees, apparently depending on the engine load, rpm, throttle position, etc. As a result of the knock retard, the engine feels "rough".

The code is not set because you have 8-12deg knock retard. The code is set by the faulty knock sensor circuit, and the PCM defaults to the knock retard to protect the engine.