I am trying to finalize the wiring for my EFI to the RF harness. The Fitech unit keeps the 12v+ constant and no impact to the tune, starting or driving of the car.I know a number of you out there are running the FiTech so I'm coming to forum for some help. Hope this helps!Ī huge improvement as I do not drive this car daily (not a bronco but 68 fastback) D The LCD handheld is only powered on now when I have the key in ACC position or in the RUN. The Fitech unit keeps the 12v+ constant and no impact to the tune, starting or driving of the car. I tested the drain again and it was steady at 3.5ma.meaning my battery would reach 40% charge in (20 AH)/(0.0035 A) = 5714.3 hours = 238 days.Ī huge improvement as I do not drive this car daily (not a bronco but 68 fastback) D The LCD handheld is only powered on now when I have the key in ACC position or in the RUN. I took the harness, terminated the red wire (12v+ constant from the Fitech), and ran a new accesory (12v+ switch) to the LCD handheld. So I disconnected the battery first and the power wiring for the LCD handheld is coming right off the unit and into my car. I didn't want to keep having to reconnect and disconnect the LCD handheld so decided to remove the constant power to the LCD handheld and change it to a switched power source. So my battery would reach 40% charge in (20 AH)/(0.048 A) = 416.7 hours = 17 days. I have an optima battery 34/78 red top rated at a 50 AH capacity, at 40% of full charge (100% being 12.6V and 40% being 11.9V) then ( 50 AH ) X ( 40% ) = 20 AH to reach 40% charge. As the LCD handheld is in "sleep" mode, it does drain quite a bit from what I found and the battery would be dead about every 2 weeks. I did the test again with just disconnecting the LCD handheld and the same result, stayed steady around 3.5 ma. The 3.5 ma is for my stereo memory so all fine there. I disconnected the main fuse for the unit (lost my tune by the way so be aware if you do what I did just had to redownload my backup so its all fine), and the drain went from the settled 48.0 ma down to 3.5 ma. I already had assumed the Fitech was the reason behind the drain, but went through all the fuses and found the Fitech was indeed the culprit. When first connecting the battery, the drain was 81.1 ma -> this then settled to 48.0 ma once the LCD handheld controller went into "sleep" mode / displayed turned off. So I came across this thread and wanted to shared.The Fitech does drain the battery, but only the LCD handheld controller (from my testing).
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December 2022
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