barge Posted November 3, 2018 Report Share Posted November 3, 2018 Is there any way to supply a regulated 12V to the ECU so that it maintains comms connection during cranking without messing up all the VBatt type compensations in the ECU? Even with a stock size battery I "think" i am getting too much voltage drop during cranking to maintain comms. Unless there is a good method of logging and trigger scoping in the ECU on it's own during a crank I'd like to remain connected during cranking. I've seen some other threads about bad grounds, starter noise, etc. All the grounding is to stock points and there's not much I can do about the factory starter. Quote Link to comment Share on other sites More sharing options...
Stevieturbo Posted November 3, 2018 Report Share Posted November 3, 2018 Sounds like you're dreaming up a problem...instead of looking for whatever actual problem you're trying to describe. Quote Link to comment Share on other sites More sharing options...
Adamw Posted November 4, 2018 Report Share Posted November 4, 2018 Is this a new install or has it just started playing up? Does it just drop comms or does it not start either? 14 hours ago, barge said: Unless there is a good method of logging and trigger scoping in the ECU on it's own during a crank I'd like to remain connected during cranking. You can set up ECU logging to record batt voltage so you can see whats going on during cranking without beieng connected. Quote Link to comment Share on other sites More sharing options...
barge Posted November 4, 2018 Author Report Share Posted November 4, 2018 It's been running for a while. It has always dropped comms during a startup. Now that it's cold I'm working on cold start and I'd like to check the trigger levels and such. Quote Link to comment Share on other sites More sharing options...
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