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Old 09-30-2006, 10:46 AM   #1
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Default Question about knock sensors

Is it entirely possible to convert a system where 1 KS is used to accept 2? More specifically, are the computers that use 2 KS have 2 inputs for KS, or 1 input with 2 sensors chained? Or would one brand-new KS be more than adequate? I am looking into, shall we say, extra insurance on a certain investment
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Old 09-30-2006, 11:56 AM   #2
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OBD2 uses two that each have a dedicated input. That'* how the PCM knows which cylinder is misfiring.
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Old 09-30-2006, 01:17 PM   #3
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On my freaky OBD1.5 I thin both of the sensors are on the Same circuit, and it uses the crak position as well to determine where the missfire happened... I could swear on the 94-95 there was one input... ??... I need to glance at the service manual...

Brad if you want a New Knock sensor I have one in the parts bin

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Old 09-30-2006, 01:33 PM   #4
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If both sensors can be wired into the same input, I am thinking that would help out alot...or it could make the system overly sensitive.

Don, I already have a new KS installed on the old block...gotta remember to snag that before the new one goes in
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Old 09-30-2006, 01:38 PM   #5
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Have you thought about how different sealants might affect KS sensitivity?
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Old 09-30-2006, 01:56 PM   #6
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Quote:
Originally Posted by J Wikoff
Have you thought about how different sealants might affect KS sensitivity?
Actually, that didn't cross at all. Easy way to solve that would be 2 new sensors as both should be equally sensitive, and teflon around the threads. The only real question is going to be "IF one input can be shared, would the new sensor have to be wired in AT or BEFORE the existing one?". I don't think it will matter much.

HOWEVER, the more I think about it...doing this may have the opposite effect of what I am looking for (more control over knock). Knock sensors create ac current as knock is generated. Adding two of these on the same circuit path w/o any kind of comparator is going to create a mirror image of sorts, and the computer will see this as "a whole lot of noise", and will go into "wig-out mode".

BAH.
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