Those who run LPG converted 2.2's

[hunker7]

Motronic wouldn't be happy. Serial might be for programming or a logger?

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I can leave them alone then

[diesel des]

Motronic wouldn't be happy. Serial might be for programming or a logger?

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[hunker7]

What do the serial in and out do?

[hunker7]

OK cool. What happens if I connect yellow wire(wide band) to motronic?

[diesel des]

Yes Brown wire looks like the one. Connect it to signal wire from stock narrow band sensor. Then cut the wire to the narrow band. Put crimp connections on it so you can swap back and forth between sensors if required

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[hunker7]

Yep your wires sound ok. White needs connected to a light circuit to dim the display.

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Where does yellow get connected to? I assume somewhere near ECU?

EDIT: Just read over it, brown is 0-1v output and yellow is 0-5v, so brown is for motronic and yellow is for LPG ecu.

[diesel des]

Yep your wires sound ok. White needs connected to a light circuit to dim the display.

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[hunker7]

Planning on fitting wide band this weekend. Yellow wire connects as "narrowband" output for Motronic if I'm correct?

What is SERIAL IN & OUT for?
Where best to connect white wire?

[hunker7]

Petrol cools with rich mixture. Lpg gets hotter with rich mixture as it's not a liquid. So don't run it as rich. I measured egt 30 deg c cooler on Lpg doing this.

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Makes sense thanks Des Once I have it set up, I will log it as well on a quick drive to see if it runs properly.

[diesel des]

Petrol cools with rich mixture. Lpg gets hotter with rich mixture as it's not a liquid. So don't run it as rich. I measured egt 30 deg c cooler on Lpg doing this.

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[hunker7]

Yep when on boost the Motronic goes open loop and doesn't know what the afr ratio is so when you adjust it in the gas ecu that's all you need to do.

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Sound Is LPG running leaner because of increased EGT?

[diesel des]

Yep when on boost the Motronic goes open loop and doesn't know what the afr ratio is so when you adjust it in the gas ecu that's all you need to do.

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[hunker7]

Modeling tab. Look at afr and also the point on the graph and adjust to suit.

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So every time I'll adjust points, and write it afr will change, no need to reset ECU or anything?

[diesel des]

Modeling tab. Look at afr and also the point on the graph and adjust to suit.

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[hunker7]

How do I set it? Just using modelling tab, or is there something that will make my life easier?