NUckINg FuTS

I remember hearing about this a awhile back but looked through the archives and could not find it. It had something to do with replacing the knock sensor with a resistor to fool the computer in thinking that there is no knock coming from the sensor incase of false knock. Anyone have info on this? Thanks.

hookedup

Modify your search to look back to last summer using KS desensitize , thats where I found out about it. Didn't save the thread it but its pretty easy to do and you can very the amount of sensitivity.

If you don't find it, drop me an email.

Good luck, Dave :thumbs:

NUckINg FuTS

Checked the archives again, no luck :cry :banghead:

72tccracer

The knock sensor on the 86 is 100k ohms, so if you put a 100k ohm resistor in line to ground the ecm will think that it will never see a knock.

On the 90 and up the knock sensor is 4.3 k ohms.

Chuck MacTrinder :flag

VMAX451

If you want to desensitize the knock sensor (as opposed to completely bypassing it), there's some good info here:
http://www.charm.net/~mchaney/f-tech.htm

Widebody

There are two ways to go about this. There was a techtip by 65Z01, James Kovitch on false knock with the 85-89 cars. Accordingly he was told by Gordon Killebrew to replace his stock ECS module with the upgraded GM P/N 16038331. Or you can desensitize the knock sensor by one of two ways. One, wrap teflon tape around the threads of the sensor and screw into the block lightly. Two, the guys running marine applications use a 45 degree or 90 degree elbow to desensitize the sound board the sensor uses to detect knock. Hope this helps

88TripleBlackConvertible

Very simple, unplug the sensor completely, disconnect the neagative battery to reset the ecm. Done! No more retarding timing. Dangerous but it works.

NUckINg FuTS

Hey guys,

I'm not to desensitize it, I want to bypass it completely :yesnod:

Wouldn't this set a code. What I understand is the computer needs a signal at all times. I'm probabley wrong.

CFI-EFI

I was getting false knock counts on my '84. With 93 octane and initial timing set at 0*, it "knocked" revving it in neutral. I unplugged the sensor wire at the ESC. No more counts, and no light. When I over advance the timing, I can HEAR when it knocks, just like the "good old days", and react, accordingly. Good luck, and...

RACE ON!!!

JoBy

It will knock before you can hear it. If you disconnect it you might consider building a knock indicator light. It is real simple.
http://forums.corvetteforum.com/zerothread?id=528523