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  #1  
Old 07-13-2011, 11:11 PM
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Question Knock? Not sure what to think about this.

This is at idle. Is that bad? Im not sure whats what.


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Old 07-15-2011, 10:44 PM
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Its probably just bad gas. what octane and performance tune are you running?
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Old 07-16-2011, 02:02 PM
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But every time ive checked thats what it was showing. And 91 tune with 91 octane.
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Old 07-17-2011, 02:12 AM
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by looking at that live data, its hard for me to say if that is normal voltage to the sensors or not, but by looking at that timing retard, i would say probably not. that is if that is 15 degrees of timing being pulled. but try adding some octane boost and see if that helps/fixes the problem. if not, try loading the stock tune back on and look at that data and compare.
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Old 07-17-2011, 02:53 AM
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Quote:
Originally Posted by robustRed View Post
by looking at that live data, its hard for me to say if that is normal voltage to the sensors or not, but by looking at that timing retard, i would say probably not. that is if that is 15 degrees of timing being pulled. but try adding some octane boost and see if that helps/fixes the problem. if not, try loading the stock tune back on and look at that data and compare.
Well you lost me a bit...but is there a way i can tell if that is normal voltage going to the sensors? And ok ill try that stuff. Thanks for the help! Rep
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Old 07-17-2011, 12:25 PM
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with my combine knowledge of knock sensors and google's help, this is what i compiled.
: A knock sensor basically acts like a stethoscope; it picks up a specific frequency that is produced when there is a knock or ping. So what is happening is, there are a bunch of things happening all at once and it confuses the knock sensor so it starts producing a little voltage(sensor hears noise-produces voltage). The normal operating voltage is usually low(5 volts max) so a little voltage like you are seeing should be normal.

but to be on the safe side, if what i suggested doesn't help, listen for a knock or ping in the driveway. if there is none, then this is normal.
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