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internal voltage


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Hi all , i have a strange happening , i am midway through a GDI install , i noticed the other day that the tuning software drops out if i crank the engine , if i run a battery charger it doesnt happen..

Checked the internal voltages in Runtime and the 5 volt and 8 volt are spot on but the 12 volt is reading 10.3 V!! , i have checked the voltage with a DMM at the power source at the battery and at the ECU , it varies from12.6 to 12.4 , but the internal still says 10.3 , when cranking the DMM does,nt go below 10.6.

Thanks in advance Keith

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