tuning with a wideband for running with a nb.

PortbluePGT · Post by **PortbluePGT** » Sun Apr 16, 2006 7:09 pm

I just purchased the XD-1 with the LC-1. I plan on installing them this week sometime. I have been Running the MS-I V2.2(Fuel Only) for almost a year now. I will be installing the Resistor. Never used a wideband before. I am a little worried I will screw something up.

-Donny

MarkW · Post by **MarkW** » Mon Apr 17, 2006 3:00 am

Hi Guy's bit of a newbie so be gentle, just read through everything and am I right in saying that if you've done the basic set up and mapping with a wideband and then switched back to narrow band then you shouldn't need to change the VE tables etc?

FoundSoul · Post by **FoundSoul** » Mon Apr 17, 2006 4:09 am

PortbluePGT wrote:I just purchased the XD-1 with the LC-1. I plan on installing them this week sometime. I have been Running the MS-I V2.2(Fuel Only) for almost a year now. I will be installing the Resistor. Never used a wideband before. I am a little worried I will screw something up.

-Donny

Just use the 'Quick Start Guide' as it's the clearest step by step info that's included for installation. Ground it together with your ECU or datalogger if you're using one. (MegaSquirt?) And lastly use the 470ohm 1/4 watt resistor between the analog output of the LC-1 and the 02 input of the MegaSquirt.

There's a handful of wires but it's not that bad, especially with the quick start guide and this info....

FoundSoul · Post by **FoundSoul** » Mon Apr 17, 2006 4:10 am

MarkW wrote:Hi Guy's bit of a newbie so be gentle, just read through everything and am I right in saying that if you've done the basic set up and mapping with a wideband and then switched back to narrow band then you shouldn't need to change the VE tables etc?

That's correct-- no need to change your tables if you tune with wideband but then swap to narrowband for EGO correction/daily driving.

PortbluePGT · Post by **PortbluePGT** » Thu Apr 27, 2006 4:27 pm

FoundSoul wrote:470 ohm 1/4 watt

Jerry, I installed the XD16 AKA XD-1 and the LC-1 but I did not use the yellow analog wire. I only used the Brown wire with the resistor. Is that ok?

I sent you a PM also.

MSnS-E, MT225b717 V2.2 Main Board..... I think

-Donny

FoundSoul · Post by **FoundSoul** » Fri Apr 28, 2006 3:28 am

That will be fine-- they are both analog outputs and wire up the same way.

TPI 85 Blazer · Post by **TPI 85 Blazer** » Mon Aug 21, 2006 5:56 am

FoundSoul wrote:The question is what if the extra resistance needs to be before the 1M resistor to ground (R11), and not after it like R10 is?

Without knowing this I can't tell you it will help to increase the value of R10... even though that would be my suspicion as to where it might need to be. I'm waiting on the experts here.

If the issue is current draw from the LC-1, then changing the MS resistor should work every bit as well as putting in a cheesy resistor in the harness. The 1MOhm draws almost no current.

As for this thread in general, the issue would be solved by a digital interface between the WB and the MS. We have a digital controller and a uP, but the interface is analog. With some more code, a second serial com chip could be added to MS and the LC-1 could be detected at all times. This could also be helpful to tell MS not to use the EGO values unitl the controller says that the sensor is warmed up. I believe it reads full rich right now. Troubleshooting another serial interface would be harder than a 0-5V signal, though.

To make the analog work, all you have to do is use the Innovate software to read the AFR through the digital interface while simultaneously reading AFR in MT. As long as the two match, your analog setup is OK.