02-01-2023, 07:50 AM
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CC Member
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Join Date: Jun 2014
Cobra Make, Engine: Backdraft Racing, Ford Racing Z460
Posts: 5
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12.4v at battery but 10v showing on v-gauge and FAST EFI controller
Hi All,
Thanks in advance for the commentary:
My BDR starts great when cold but not so much when hot. Just to eliminate the basics I'll have the battery load and alternator tested then double check that the major grounding points are solid but, with the ignition on (engine not running), I get 12.4v at the battery but only 9.9 to 11 volts displayed on both the voltage gauge and the FAST EFI controller.
That makes me think there may be an impedance issue that possibly gets worse as the car heats up (understood that the voltage will be lower at the gauges due to expected load from things like fuel pumps, etc but, 2+ volts down seems odd).
Thoughts?
Last edited by rlbarranco; 02-01-2023 at 08:45 AM..
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