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Old 10-08-2013, 10:55 PM   #1
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Default MSPNP2 9093 LC2 Issues!

Recently bought a mspnp2 9093 and it installed easily and works fantastic. But I'm having a few issues with my Lc2 Wideband install. Car is running rich(can smell it). Gauge in car reads anywhere from 10-12.5 at idle. But in Tunerstudio i can't get a reading that is remotely useful. It sits at 12.10 or jumps all over the place. Installed as follows.

1. Did free air calibration.
2. Plugged in.
3. Ran 4 wires coming off controller. (Yellow)To gauge. (Red) To good power source. (Brown) Pin 21 serial port. WBO2 input. (Black) Grounded by throttle body with the gauges ground.
4. Calibrated the sensor in lmprogrammer.
5. Change between lambada and wideband trying to figure it out in tunerstudios project settings. Also tried many different things in AFR table calibrations.

And after all this. It still doesn't want to give me a good reading. Any ideas?
This is a 1.6 1990 miata. Thanks in advance for any advice. Because at this point I'm completely lost.
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Old 10-09-2013, 12:26 AM   #2
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I'd double check the wiring/grounding where the wideband is fed into the ECU. The fact that it jumps all over the place is what makes me suspect a wiring issue.
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Old 10-09-2013, 12:38 AM   #3
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is it steady on the gauge and only erratic wen viewed in TS? If so i would have to agree with a wiring issue, in which case i would suspect you are using the wrong wire. I believe one is analog which is used for stock ecus for narrowband signal. The other is a wideband signal, i forget which color is which.


If the gauge is also erratic, then the tune is erratic
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Old 10-10-2013, 08:43 PM   #4
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I appreciate the information. I have my gauges ground and controllers ground going to the 26 pin serial ground on the megasquirt. Im giving the gauge wideband signal wire(Yellow) and mspnp lambada signal(Brown). Im reading good volts that make sense with multimeter on brown and yellow. But even with calibration in tunerstudio it is still just sitting there reading 12.10:/. I'm almost at wits end. now that the gauge is grounded to ecu the gauge seems more stable. I don't understand where I'm going wrong.
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Old 10-10-2013, 10:46 PM   #5
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You may have addressed this already. But have you tried setting the wideband output to lambda instead of afr? maybe the megasquirt is expecting lambda
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Old 10-10-2013, 11:40 PM   #6
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As in project settings? Ooor? Becuase ive tried lambada and wideband there. My ego settings are single wideband. But in ve analyze it has the afr gauge that always reads a solid 12.10. Is there maybe somethkng else to change that im not aware of?
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Old 10-11-2013, 12:05 AM   #7
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sorry, no i meant in lmprogrammer
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