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Spark Advance?

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Old 01-07-2007, 12:42 AM
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Default Spark Advance?
Is this the same as KR?

I had a Snap ON scanner plugged into the car tonight and it showed me 21° of Spark Advance

Is this right? Car was at running temp, in park and no codes
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Old 01-07-2007, 12:54 AM
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Advance is the opposite of KR.
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Old 01-07-2007, 12:56 AM
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So is 21° of Spark Avd good or normal at idle?
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Old 01-07-2007, 01:04 AM
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yeah, i remember having like 24 degrees when i scantooled mine, so i figured it was good.

just to add a question to this, not to hijack...what is a good number?
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Old 01-07-2007, 01:06 AM
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That'* NORMAL for idle. Not good or bad. Timing advance doesn't mean much for power at idle.

KR, when it happens, will subtract from whatever advance the pcm is trying to use.
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Old 01-07-2007, 01:11 AM
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What does KR stand for? I could not find it in the search :?
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Old 01-07-2007, 01:12 AM
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Knock Retard, Retard
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Old 01-07-2007, 01:15 AM
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Hey, you spelled someting right! That'* post #8?

J/K
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Old 01-07-2007, 01:17 AM
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When your knock sensors 'hear' (they're acoustic sensors) knock, they retard your timing to prevent more knock from happening. You lose power with retarded timing.
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Old 01-07-2007, 01:21 AM
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This scanner did not show a KR reading or i was not looking in the right spot :?

Are the sensors replaceable / easy to get to?
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