LC-1 AFR reading problems.

[ak-]

Are you running a stock computer or standalone?

standalone - whodwho msv2

This was working normally like it should when I was on Motronic - though it wasn't spliced into my o2 connector at that time. Just straight to the bung.


I've noticed when I upshift/down-shift the gauge will blip down to "X" AFR and quickly jump and peg to 22.2 and stay there.
So this means I am for certain getting a constant 5v? Does that point to a bad o2 sensor?

If I connect analog 1 (narrowband) instead of analog 2 (wideband) to my o2 signal wire, it stays pegged at 7.4 AFR (0v)

[jntar]

How close is the unit to your coil or plug wires? They do not like to be near ignition items. Mine pegged constantly until I moved it away from my coils.

Can you also post up a list of wiring? I'm a bit confused on what you have connected where.

[ak-]

How close is the unit to your coil or plug wires? They do not like to be near ignition items. Mine pegged constantly until I moved it away from my coils.

Can you also post up a list of wiring? I'm a bit confused on what you have connected where.

The wideband controller itself is in my glovebox and my coil is mounted right behind my passenger headlight!

[LC-1 wire]

1. RED - - - - - - - - -12v switched - - - - - - - - - - Defroster switch
2. BLUE - - - - - - - - Heater ground - - - - - - - - - ECU shock tower ground
3. WHITE - - - - - - - System ground - - - - - - - - -ECU shock tower ground
4. BLACK - - - - - - - Calibration wire - - - - - - - - -ECU shock tower ground
5. YELLOW - - - - - - Analog 1 (narrowband) - - - - Capped off
6. BROWN - - - - - - -Anolog 2 (wideband) - - - - - Signal wire on o2 (black wire of the 4) AND AFR gauge signal wire (white)

[ak-]

With this wiring it stays pegged at 22.2 AFR with occasional blips to a lower AFR if I downshift or upshift.


If I use Analog 1 instead of 2, it stays pegged at 7.4 AFR instead.

[jntar]

What gauge are you using?
Do you have the LED and/or the calibration button wired in?

Get into log works and match analog 1 to analog 2. Dont run both the gauge and megasquirt off one output. Some have had issues when doing that.

[ak-]

What gauge are you using?
Do you have the LED and/or the calibration button wired in?

Get into log works and match analog 1 to analog 2. Dont run both the gauge and megasquirt off one output. Some have had issues when doing that.

I'm using the gauge provided by Innovative.
I've matched both analogs before on logworks so that they are both 7.4 - 22.2 / 0v - 5v and it didn't help :(

How should I run the outputs then? I feel like I've tried nearly all possibilities and combinations.
Are you saying set them both to wideband and run one to the gauge, and one to MS?

[jntar]

I'm using the gauge provided by Innovative.
I've matched both analogs before on logworks so that they are both 7.4 - 22.2 / 0v - 5v and it didn't help :(

How should I run the outputs then? I feel like I've tried nearly all possibilities and combinations.
Are you saying set them both to wideband and run one to the gauge, and one to MS?

Innovate makes many gauges. Each of which has different input wire colors.

Yes, set both as if they were wideband signals so both the gauge and the megasquirt sees 0-5v. Be sure you go calibrate the MS unit in tunerstudio to innovate lc-1 0-5v.

Does it read the same in tunerstudio as it does on the gauge?

[whodwho]

4. BLACK - - - - - - - Calibration wire - - - - - - - - -ECU shock tower ground

This one should not be connected except while calibrating

6. BROWN - - - - - - -Anolog 2 (wideband) - - - - - Signal wire on o2 (black wire of the 4) AND AFR gauge signal wire (white)

You don't want to share the output, set both outputs for 0-5v output and use one for each

[dewme5]

It really sounds like you have the narrow band o2 in there.

[jntar]

4. BLACK - - - - - - - Calibration wire - - - - - - - - -ECU shock tower ground

This one should not be connected except while calibrating

6. BROWN - - - - - - -Anolog 2 (wideband) - - - - - Signal wire on o2 (black wire of the 4) AND AFR gauge signal wire (white)

You don't want to share the output, set both outputs for 0-5v output and use one for each

This is what I was thinking, but the lc-1 diagrams say to have it grounded unless running a specific gauge. Maybe I read them wrong. I have the calibration button and led hard wired in.

[nando]

aren't you only supposed to ground the calibration wire when you're calibrating it? or is that through the switch?

I'd pull that off and see what happens. did you already go through the calibration steps?

[whodwho]

It grounds thru the switch to initiate the calibration mode and the feeds the led the results codes

[nando]

Yeah, im wondering if he included the switch or wired straight to ground

[ak-]

Innovate makes many gauges. Each of which has different input wire colors.

Yes, set both as if they were wideband signals so both the gauge and the megasquirt sees 0-5v. Be sure you go calibrate the MS unit in tunerstudio to innovate lc-1 0-5v.

Does it read the same in tunerstudio as it does on the gauge?

4. BLACK - - - - - - - Calibration wire - - - - - - - - -ECU shock tower ground

This one should not be connected except while calibrating

6. BROWN - - - - - - -Anolog 2 (wideband) - - - - - Signal wire on o2 (black wire of the 4) AND AFR gauge signal wire (white)

You don't want to share the output, set both outputs for 0-5v output and use one for each

I'll set both to wideband outputs and use them separately as advised and see what happens.

This is what I was thinking, but the lc-1 diagrams say to have it grounded unless running a specific gauge. Maybe I read them wrong. I have the calibration button and led hard wired in.

aren't you only supposed to ground the calibration wire when you're calibrating it? or is that through the switch?

I'd pull that off and see what happens. did you already go through the calibration steps?

This is the gauge I'm running - what came with the 6wire kit.

It grounds thru the switch to initiate the calibration mode and the feeds the led the results codes

Yeah, im wondering if he included the switch or wired straight to ground

Can you explain what do you mean by including the switch vs. straight ground? I have the LED and calibration setup correctly where it flashes warm-up mode and allows me to calibrate.


I'm about to try and set both outputs to wideband and make them exclusive to the gauge and MS to see what happens - I'll update in a bit.

[jaywood]

Good luck :p keep us updated if you figure it out.