I'm curious if anyone as insight on maintaining memory in a stock GM ECU when utilizing a battery isolator. I'd like to maintain long/short term fuel trims when I isolate the battery. I know I can plug into the OBD2 port with a 12V source, but have no idea what current draw will be. Has anyone done this, and if so, what battery capacity was needed to prevent the ECU from dumping memory for a few weeks?
maintaining memory in ECU
- Thread starter spud
- Start date
Shaun
Supporter
I think some isolators have the ability to provide a small bypass current for just that
This one is what I have
www.carbuilder.com
This one is what I have
Battery Isolator Cut-Off Switch ***FIA*** Version
1000 Amps for 5 seconds.100 Amps continuous.10mm ring terminals.1/4" Spade terminals.One key.
Are you looking for a device like this? Not sure if it would last 3 weeks? Obviously some cigarette lighters are keyed, if so, you'd keep your key in on acc mode.
Powerbuilt 648539 Computer Memory Keeper https://a.co/d/6qZq2RF
I'd personally just float charge the battery, I've had good luck with this one (I own 4 of them).
NOCO GENIUS1, 1A Smart Car Battery Charger, 6V and 12V Automotive Charger, Battery Maintainer, Trickle Charger, Float Charger and Desulfator for AGM, Motorcycle, Lithium and Deep Cycle Batteries https://a.co/d/53UGQqV
Powerbuilt 648539 Computer Memory Keeper https://a.co/d/6qZq2RF
I'd personally just float charge the battery, I've had good luck with this one (I own 4 of them).
NOCO GENIUS1, 1A Smart Car Battery Charger, 6V and 12V Automotive Charger, Battery Maintainer, Trickle Charger, Float Charger and Desulfator for AGM, Motorcycle, Lithium and Deep Cycle Batteries https://a.co/d/53UGQqV
