lc-1 pid at idle

[mtnman]

I've programmed my lc-1 analog 2 for the following:

0.88333 Volts at AFR: 10.00
4.21667 Volts at AFR: 20.00
and at temp of 180 degrees and above I'm getting :

CALC.AFR_LC12 (volts) = 0.6
CALC.AFR_LC12 (AFR) = 9.29

1. Does this look right for idle values in efilive or should tweak the calc pids equation some?

[joecar]

Post a picture of your LC-1 response curve (as you programmed into your LC-1).

Post the calculated pid text that you're using for CALC.AFR_LC12.

The way you programmed your LC-1, it should be flatlining at 0.88333V and should not be outputing a lower voltage.

[mtnman]

Here they are.

[joecar]

For (10.0,0.883) and (20.0,4.216) use the following:

"({EXT.AD1} - 0.883) * 3 + 10"
"({EXT.AD2} - 0.883) * 3 + 10"


Here's how I got the 3 (the slope)...
(20.0-10.0)/(4.216-0.883) = 3.000

Because you're not zero based, you have to subtract 0.883 from analog voltage before multiplying by the slope.

Sanity check...
(0.883-0.883)*3.000+10.0= 10.0
(4.216-0.883)*3.000+10.0= 19.999

Anything ouside the range 0.883V..4.216V is meaningless (should flatline at those voltages);
Why are you seeing 0.6V...?

Temporarily program your LC-1 to put out 2.5V at both AFR's and see what {EXT.AD1} or {EXT.AD2} read...?

Edit: These...
"({EXT.AD1} - 0.883) * 3 + 10"
"({EXT.AD2} - 0.883) * 3 + 10"

simplify to:
"{EXT.AD1} * 3 + 7.351"
"{EXT.AD2} * 3 + 7.351"

So you had the calc pids correct, but it pays to sanity check since
these calc pids are for the LC-1 default points (7.35,0.0) (22.39,5.0).

[mtnman]

Programmed the LC-1 wb02 to 2.5v with the pid values you provided and the idle scanned values were :

Min 1.3V, 11.19 AFR

Avg 1.3V,11.20 AFR

Max 1.3V, 11.24 AFR

[Tordne]

Programmed the LC-1 wb02 to 2.5v with the pid values you provided and the idle scanned values were :

Min 1.3V, 11.19 AFR

Avg 1.3V,11.20 AFR

Max 1.3V, 11.24 AFR

So in that cazse it loks like the VE is still going to be dropped by quite a bit from stock, which is interesting . But at least not the AFR values should be accurate.

Let me know how you go...

[joecar]

Programmed the LC-1 wb02 to 2.5v with the pid values you provided and the idle scanned values were :

Min 1.3V, 11.19 AFR

Avg 1.3V,11.20 AFR

Max 1.3V, 11.24 AFR

Ouch...

You programmed your LC-1 to output a flatline 2.5V and you're reading 1.3V at the AD1/AD2 inputs (orange plug)...?

You're dropping 1.2V somewhere...
How're you connected/grounded (diagram...?)...?

Using a DMM, what is the voltage across the orange plug...?

[mtnman]

White, blue and black are grounded at the same location (chassis ground).


Brown -> flascan C {EXT.AD2}
green -> flashscan D analog voltage common ground

Should black, green and white all be connected together to flashcan "D" location?

[joecar]

White, blue and black are grounded at the same location (chassis ground).

Black should not be grounded (this is the calibration wire, grounding this causes the LC-1 to calibrate);

First, remove the black wire from ground and measure voltage again (looking for 2.5V at EXT.AD2).

Then, if it's still not right, remove the white wire from ground.

Do you have the LED connected between white and black...?
If you do, the LED flashing without pausing means the LC-1 is calibrating.

I have my white and green not grounded:
I use green as the "floating ground" for the NBO2 connection,
and white as the "floating ground" for the EXT.AD2 connection.

[mtnman]

i read on the sticky here that white goes to green which goes to flashscan D location, is this right?