Knock Return questions.. 93 SSE - GM Forum - Buick, Cadillac, Chev, Olds, GMC & Pontiac chat


1992-1999 Series I L27 (1992-1994 SE,SLE, SSE) & Series II L36 (1995-1999 SE, SSE, SLE) and common problems for the Series I and II L67 (all supercharged models 92-99) Including Olds 88's, Olds LSS's and Buick Lesabres Please use General Chat for non-mechanical issues, and Performance and Brainstorming for improvements.

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Old 07-18-2006, 02:17 PM   #1
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Default Knock Return questions.. 93 SSE

I'm running the scan tool (thanks Bob) to check the temp of the car, and I started looking at the KS Counter, and Knock Return.. here'* what I got..

All this occurs during TCC lockup


Over a 29 minute drive the KS Counter came out at 94

Knock Return while driving 45MPH averages out between 12-13
Knock Return while driving 65MPH sits between 5-7

When TCC isn't applied it'll immediately drop to 0


Is this bad?
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Old 07-18-2006, 03:11 PM   #2
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Retard, not Return...

You should have no KR while cruising at steady speed. Under normal conditions, one may get a degree or two while maintaining speed under load or up a hill, but on level ground at steady speed, you should have none.
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Old 07-18-2006, 04:02 PM   #3
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Moose... what octane fuel are you running in that 113F weather?
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Old 07-18-2006, 05:07 PM   #4
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87 with the STP fuel additive
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Old 07-18-2006, 05:34 PM   #5
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Quote:
Originally Posted by MooseGundr
87 with the STP fuel additive
run 92 or 93 you will feel a little diffrence., i did...
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Old 07-18-2006, 06:16 PM   #6
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Quote:
Originally Posted by MooseGundr
87 with the STP fuel additive
that is your problem....you need at LEAST 91octane, with the 92-93 preferred
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Old 07-18-2006, 06:43 PM   #7
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I do agree you need to try some higher octane, but not as a permanent solution. Fill up with premium, or throw a gallon of toluene in. See if your KR goes down. If it does, inspect your plugs, try some seafoam through the intake... If it does not, you may be getting false KR, possibly from large exhaust manifold cracks.

Or... is your SSE supercharged?
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Old 07-18-2006, 06:46 PM   #8
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Alright I'll do that. I thought the fuel additive brought up the octane for some reason.. Premium it is
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Old 07-18-2006, 06:47 PM   #9
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Let us know how it goes. Having to use premium in your engine is a band-aid for something else.
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Old 07-19-2006, 01:35 AM   #10
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Quote:
Originally Posted by J Wikoff
Or... is your SSE supercharged?
Mike is N/A, but with those miles and the lovely weather here in summer, a tank of higher octane might help. I agree though,that there must be somethjing else happpening.
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