Thread: What’s going on.

Initially, simplest thing, I guess I would get the jumper leads out and hook up your LiPo backup battery to make sure you have proper battery function as far as current is concerned.

8749B31E-25CE-4933-B0D3-0BDBDBC29340.jpeg[/QUOTE]

Strange looking graph, not what would be expected for Voltage Vs Time when cranking an engine. I gather the "X" axis is time ?? units would be seconds??
Maybe explain the car actions in relation to the graph,have a careful look at how you are recording the data.

Start V graph.JPG

Peter

Originally Posted by PeterJ

Initially, simplest thing, I guess I would get the jumper leads out and hook up your LiPo backup battery to make sure you have proper battery function as far as current is concerned.

8749B31E-25CE-4933-B0D3-0BDBDBC29340.jpeg

Strange looking graph, not what would be expected for Voltage Vs Time when cranking an engine. I gather the "X" axis is time ?? units would be seconds??
Maybe explain the car actions in relation to the graph,have a careful look at how you are recording the data.

Start V graph.JPG

Peter[/QUOTE]That’s over a 24 hour period. So start and drive for half an hour. Stop for an hour and a half. Start and drive for about 15 minutes. Then stop.

Hi Sean, sorry my bad interpretation of what you were explaining. I would still try jumper leads or change to a known good battery as a easy quick check, how old is your battery?. After that, have another go at describing symptoms. Time the cranking cycle until start, does it happen hot / cold/ both. Is it becoming more frequent, any other things come up, perhaps error codes, unusual warning lights.

Peter

Originally Posted by PeterJ

Hi Sean, sorry my bad interpretation of what you were explaining. I would still try jumper leads or change to a known good battery as a easy quick check, how old is your battery?. After that, have another go at describing symptoms. Time the cranking cycle until start, does it happen hot / cold/ both. Is it becoming more frequent, any other things come up, perhaps error codes, unusual warning lights.

Peter

Battery (Odyssey PC1350) replaced Jan 2019. Definitely worse when cold. But doesn’t appear to be related to the battery voltage. 12.5 -12.6V should be plenty to start the vehicle. Struggled to start this afternoon. Hadn’t been driven for a couple of days. 4km drive to get fuel. Started fine after filling up. If the voltage gets pulled down far enough get a lot of faults due to losing power. The strange thing is how it will continue slowly turning over much longer than you would expect with a flat battery. Starter motor??

I’d almost put money on the battery having problems.
I went with the PC1350, and 3 months later threw it back at the shop... went bad really quickly.

Originally Posted by Tombie

I’d almost put money on the battery having problems.
I went with the PC1350, and 3 months later threw it back at the shop... went bad really quickly.

Hope that’s not the problem.

There is one fault that won’t clear.

.8FCFD705-65DD-450C-974A-85A6E9F39AB6.jpg

Battery voltage is no indicator of health. It’s float voltage doesn’t correlate to the amperage it’s able to deliver. That said, that’s an interesting and related fault you have there. Maybe the failure of the battery saver relay has caused your battery to become really severely depleted/damaged? Dunno??

From a while back on this forum... may help you in working through it.


HELP!! Washed car. Lots of Faults. Where do I look?