PCM Diagnostics & Tuning HP Tuners | Holley | Diablo

knock sensor ?

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Old Jun 13, 2006 | 12:25 PM
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Default knock sensor ?

What is the proper procedure to reduce the sensitivity of the knock sensors? I am experiencing false knock and would like to give this a try. Thanks!
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Old Jun 13, 2006 | 12:53 PM
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Verify it is false knock with a little 100UL or some race fuel first...
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Old Jun 13, 2006 | 03:46 PM
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I will. Thanks!
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Old Jun 13, 2006 | 08:03 PM
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How do you know its false knock?
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Old Jun 14, 2006 | 03:16 PM
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The knock is in the same RPM range all the time. Even pulling timing down to 18* shows 3-4* of retard.
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Old Jun 14, 2006 | 03:37 PM
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what is the rpm range?
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Old Jun 15, 2006 | 01:34 PM
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It's pulling timing from around 4400 thru 6000 RPM. Like I said, timing is at 18-20* in that range and I'm still logging 3-4* of retard.
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Old Jun 15, 2006 | 01:45 PM
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I would still try to verify it is false. Even though it seems it is pretty much false, I would pull it down to 15*, make sure the AFR is good and run some higher octane. Could be a knock sensor going bad.
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Old Jun 15, 2006 | 01:54 PM
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Thanks for the advice! I'll give it a shot. I don't have a wideband to monitor a/f ratio so can I go by the mV readings on the narrow bands? 890-910 mV I believe? I will try some 100 ul when I get down to about 1/4 of a tank, I just filled up w/ 93. I was thinking 15-20* is kinda low even with the LS6 heads. They're good, but not that good.
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