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1997 Pontiac Grand Prix GT
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46 Posts
Discussion Starter · #1 ·
I've noticed that when I monitor my timing advance (KR) it's usually around -20 to -25 degrees during normal driving. WOT it'll hit 0 degrees but that's the most I've seen. Is this normal on a stock N/A 3800? The only thing I've really done so far is the ZZP "tune".
 

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1998 GTP coupe. All stock and rust free. That will change soon.
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101 Posts
I'd have to check previous notes about how the 97 reports WOT timing. The 97 reports timing weird. the -20 / -25 really means you have 20 to 25 degrees of advance which is normal. At WOT a stock PCM will command a maximum of 15 degrees and then apply knock retard (subtract) using the knock sensors as inputs.
 

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1997 Pontiac Grand Prix GT
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46 Posts
Discussion Starter · #3 ·
I'd have to check previous notes about how the 97 reports WOT timing. The 97 reports timing weird. the -20 / -25 really means you have 20 to 25 degrees of advance which is normal. At WOT a stock PCM will command a maximum of 15 degrees and then apply knock retard (subtract) using the knock sensors as inputs.
Ah I see, it's just a weird 97 thing, like alot of things.
 

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I've noticed that when I monitor my timing advance (KR) it's usually around -20 to -25 degrees during normal driving. WOT it'll hit 0 degrees but that's the most I've seen. Is this normal on a stock N/A 3800? The only thing I've really done so far is the ZZP "tune".
 
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