Wastegate CO2 control w/Dual MAC Valves

Discussion and Support for MoTeC's M1 series ECUs

Wastegate CO2 control w/Dual MAC Valves

Postby TurboTito on Sun Mar 15, 2026 2:38 pm

I am using individual Low Side Injector signals to trigger both Increase and Decrease MAC valves with CO2 control. They share a 12 volt constant power.

I'm not sure if this is normal, but it doesn't look normal to me.

With engine idling, the decrease valve will show 12 volts but I confirmed that the valve is actually closed.
The increase valve shows 0 volts.

I don't want to test the boost strategy until I know this is okay.
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Re: Wastegate CO2 control w/Dual MAC Valves

Postby SOReilly on Wed Mar 18, 2026 2:50 pm

Are you using GPR firmware or a partner package?
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