Symptoms of bad/faulty knock sensor

[my3awds]

I had to deal with a similar problem when tuning my friends 1g back in the day. Retarding timing, replaced knock sensor, adding fuel just didn't seem to rid it of the phantom knock. Wish we got around to figureing it out before he just replaced the engine. Is it possible to add a seperate knock sensor like a knocklite to see if you can narrow it down?

[0xDEAD]

I agree with post #15, seems driveline (clutch) related.

[ChuckP]

try lowering the boost, give 23psi a shot with similar timing. No need to run negative timing at peak torque.

[project_skyline]

Originally Posted by iturregui

Do a pull from low RPM's up to 5K and try to keep it off boost or with very little boost. If it's related to something rattling/moving it'll show up as well

Ok next time I have a hold of the car I'll try that.

Originally Posted by rolly1818

for 91 octane the timing is a bit high IMO. try -2 and peak TQ and 11/12 up top. what kinda knock number are u seeing.

OR

i said this is another post - throw in some Q16 and see if knock reduces.

if the problem persists i have another solution, but try the above first.

The car didn't like so little timing it knocked more when i gave it less. 11/12 up top are 9 numbers. This was an 8 MR.

I run the same timing on other evo's with no problems, I would have tried that If I thought otherwise.


I will look into the driveline more next time I get to look at it.

[LI Pinky]

Are you data logging your car at all? At what load are you seeing knock counts and how many? Because if your seeing a large number of knock counts at 3psi or less then you may have a faulty knock sensor and/or something rubbing or rattling to make the sensor read that.

G/L

[EVILutionVIII]

Any updates?