knock retard or is it just me?

[metalchips]

A ? for The Tuners. On my interceptor gauge it shows a few degrees of knock retard under light lugging conditions. If I accelerate it goes away, never any knock at WOT . I have a duel octane tune.

1. When does the PCM make up it's mind and go down to the lower octane table?

2.Does a few degrees of retard do it?

3.And how long does it take for the higher table to be used again?

Thanks

[COWL327]

<div class='quotetop'>QUOTE(metalchips &#064; Jun 16 2007, 09&#58;52 PM) [snapback]97009[/snapback]</div>

A ? for The Tuners. On my interceptor gauge it shows a few degrees of knock retard under light lugging conditions. If I accelerate it goes away, never any knock at WOT . I have a duel octane tune.

1. When does the PCM make up it&#39;s mind and go down to the lower octane table?

2.Does a few degrees of retard do it?

3.And how long does it take for the higher table to be used again?

Thanks
[/b]

Look at your trans torque when its lugging,its pretty high and usually you can pull a few degrees in that fuel cell and it will go away.My truck does it in the transistion from high load to where the convertor unlocks.Or just desensitize your knock sensors

[metalchips]

Thanks COWL327, but I don&#39;t have a tuning program of my own, just my gauge. But I do have a good tuner.

My last retune was last Aug.06. At that time I had not noticed any knock retard. It has just come up lately with the hot weather, poor gas who knows.
Just wondering if I should worry about it.

[COWL327]

Nothing to worry about really,You could check your air intake temps...maybe your pullin hot air from somewhere

[farmtruc]

<div class='quotetop'>QUOTE(metalchips &#064; Jun 16 2007, 08&#58;52 PM) [snapback]97009[/snapback]</div>

A ? for The Tuners. On my interceptor gauge it shows a few degrees of knock retard under light lugging conditions. If I accelerate it goes away, never any knock at WOT . I have a duel octane tune.

1. When does the PCM make up it&#39;s mind and go down to the lower octane table?

2.Does a few degrees of retard do it?

3.And how long does it take for the higher table to be used again?

Thanks
[/b]

Hey,
KR is completely normal during light load driving, during a shift or when the converter locks.
Only a few degrees is acceptable, any time it&#39;s audible is when it becomes a problem.
If you were to scan a stock vehicle, you&#39;d see some kr.
It&#39;s nothing to worry about and on vehicles that show just a few degrees during normal driving, we can slightly desensitize the ks just a tad in that area.

I&#39;ve seen the pcm switch to the lower octane table after a few cycles of constant knock.

let me know if i can help,
allen

[metalchips]

Thanks Allen. I will record some more data with the Interceptor gauge and ckeck about a retune.

[farmtruc]

<div class='quotetop'>QUOTE(metalchips &#064; Jun 18 2007, 06&#58;10 PM) [snapback]97177[/snapback]</div>

Thanks Allen. I will record some more data with the Interceptor gauge and ckeck about a retune.

[/b]

Sounds good.