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$100 Weapon-R SS header

ButtonPuncher said:
Also if it was leaned out enough to ping (detonate) our hyperactive knock sensors would kick in well in advance.




BP
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Someone on teamzx2.com put his car up on the dyno and did runs with and without the knock sensor installed. picked up a few ponies with out it. since he said " the knock sensor was picking up head chatter" at high RPMs
 
That's interesting. I'd be a bit wary of running with no knock sensor at all. It'd be nice to be able to lower the sensitivity on our stock sensor.
 
i believe we can replace it with one(of the same connector) from a focus or a newer sensor, btu dont hold me to that. they fixed the sensitivity issue later on in the focus. If you look threw all the TBS about the zx2 and contour. Both cars have one about the knock sensor being too active but they never did anything about it.

on an interesting side, you will not throw a code by disconnecting it. i had mine off for a long time and never got a code for it.
 
Really?!? WOW! I never knew about that one. I'd be interested to read that TSB. Did they specify a replacement knock sensor?

That's one thing that pissed me off about the Xcal datalogging software. It couldn't read the knock sensor on my '96 ATX PCM. That and spark advance too.
 
found that info here, but as with age the image links are now dead

Knock Sensor
Unplugging the knock sensor can cause your car to run more timing and produce more power, the gain depends on the calibration of your stock PCM....this does no/little good for those running NGP0.

The vibration from the head is enough that it makes the sensor think there is knock when it does not, at 6,000rpm the PCM turns off the sensor and the timing that it pulled gets dumped back in, you can see it in dyno's:
http://memimage.cardomain.net/member_images/6/web/414000-414999/414152_9_full.gif
Here is that same run as above(the red one/CWQ3) vs NGP0 and no knock sensor:
http://www.altecxp.net/host/NGP0.bmp

The jump at 6100rpm is the timing being added back in. If the car does not knock after 6000rpm, it will not knock before 6k rpm and is safe to disable, how ever this is only recomended on cars that do NOT have raised compression or forced induction. 89 or 91+ oct may be required.
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http://www.automotiveforums.com/t545298.html
 
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