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Discussion Starter · #1 · (Edited)
Hi,

I have an sm4 standalone fitted in an evo 3. Power was wired from evo pin 12 (12v switched) to sm4 pin 15 (12v supply). However, voltage ran significantly lower than at battery, so power was tapped from evo pin 51 (start) instead which solved the issue. 51 (start) seems to be a switched power supply, but I'm wondering if there's any concern with using it?
One odd and maybe unrelated thing is that AFR are no longer reading correctly in the ECU since the power source was switched. Thanks in advance
 
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