Woody Posted October 17, 2017 Report Share Posted October 17, 2017 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 Quote Link to comment Share on other sites More sharing options...
Simon Posted October 17, 2017 Report Share Posted October 17, 2017 I would check the terminal connection at the header plug to the ECU. Also check the grounds to the ECU are 100% including chassis and block grounds on the car. Quote Link to comment Share on other sites More sharing options...
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