Knock sensor detuning - OBDII - Page 2

Mark_Dorman · 11-26-2008, 09:42 AM

So can the flat sensors be used on the 1mz???

Newbiewan · 11-30-2008, 03:53 PM

Some guys on the SolaraGuy forums with Superchargers claim that the rear bank knock sensor picks up the S/C noise and retards the timing. So, they disconnect it and feed both knock sensor inputs at the ecu with the remaining knock sensor. I have not done that since I am concerned about longevity of that solution. This would not explain why the non-S/C guys are also experiencing the warm weather issues tho.

I think the only way to confirm for sure would be to log the knock sensor signals and timing with various octane fuels / ambient temp to see how sensitive the sensors are and how the ecu responds.

Then you could use your potentiometer idea to load the signal some and measure the effect to see if it appears safe. Ultimately it is always a balance between performance and longevity tho.

V6'er · 11-30-2008, 06:17 PM

Oh sure, now you're going to add logical thinking to mess me all up.

Actually, I've tried finding the knock sensor signals with my laptop scanner, but I don't see where I can log them.

Newbiewan · 12-01-2008, 02:26 PM

Since when have we been restricted to following the logical path? Have we been spending our hard earned dough and countless hours all in the pursuit of improving the performance and looks

of an early 90's toyota with a book value barely into the 4 digits?

I say, lets cast ourselves free of these logical chains...

turn up that potentiometer, turn it again, and again!

V6'er · 12-01-2008, 08:14 PM

The desert heat is getting to you....

conor · 12-02-2008, 02:25 AM

Quote:

Originally Posted by Newbiewan

Some guys on the SolaraGuy forums with Superchargers claim that the rear bank knock sensor picks up the S/C noise and retards the timing. So, they disconnect it and feed both knock sensor inputs at the ecu with the remaining knock sensor. I have not done that since I am concerned about longevity of that solution. This would not explain why the non-S/C guys are also experiencing the warm weather issues tho.

Some guys on SolaraGuy.com think that throttle body spacers are a real-deal performance upgrade too.

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11-26-2008, 09:42 AM	#21 (permalink)
Mark_Dorman January 18th 2009 Meet!!! Join Date: Apr 2008 Location: San Clemente (The OC), CA Posts: 1,462 Thanks: 40 Thanked 21 Times in 19 Posts iTrader Rating: (10/100% )	So can the flat sensors be used on the 1mz???

11-30-2008, 03:53 PM	#22 (permalink)
Newbiewan Mike King - Baghdad, Iraq Join Date: Jul 2005 Location: Holly Springs, NC Posts: 39 Thanks: 0 Thanked 0 Times in 0 Posts My Google Map iTrader Rating: (0/0% )	Some guys on the SolaraGuy forums with Superchargers claim that the rear bank knock sensor picks up the S/C noise and retards the timing. So, they disconnect it and feed both knock sensor inputs at the ecu with the remaining knock sensor. I have not done that since I am concerned about longevity of that solution. This would not explain why the non-S/C guys are also experiencing the warm weather issues tho. I think the only way to confirm for sure would be to log the knock sensor signals and timing with various octane fuels / ambient temp to see how sensitive the sensors are and how the ecu responds. Then you could use your potentiometer idea to load the signal some and measure the effect to see if it appears safe. Ultimately it is always a balance between performance and longevity tho.

11-30-2008, 06:17 PM	#23 (permalink)
V6'er All Torque, All the Time Join Date: Apr 2005 Location: Charlotte, NC Posts: 830 Thanks: 0 Thanked 20 Times in 14 Posts iTrader Rating: (1/100% )	Oh sure, now you're going to add logical thinking to mess me all up. Actually, I've tried finding the knock sensor signals with my laptop scanner, but I don't see where I can log them.

12-01-2008, 02:26 PM	#24 (permalink)
Newbiewan Mike King - Baghdad, Iraq Join Date: Jul 2005 Location: Holly Springs, NC Posts: 39 Thanks: 0 Thanked 0 Times in 0 Posts My Google Map iTrader Rating: (0/0% )	Since when have we been restricted to following the logical path? Have we been spending our hard earned dough and countless hours all in the pursuit of improving the performance and looks of an early 90's toyota with a book value barely into the 4 digits? I say, lets cast ourselves free of these logical chains... turn up that potentiometer, turn it again, and again!

12-01-2008, 08:14 PM	#25 (permalink)
V6'er All Torque, All the Time Join Date: Apr 2005 Location: Charlotte, NC Posts: 830 Thanks: 0 Thanked 20 Times in 14 Posts iTrader Rating: (1/100% )	The desert heat is getting to you....