Low battery voltage reason for slow starting engine?

K-Series Programmable ECU installation questions / support issues
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Low battery voltage reason for slow starting engine?

Post by A4XRBJ1 »

Hi guys,

I love the Hondata (now that I finally figured out to datalog :) )

I've uploaded both my .cal and my log file of me trying to start the engine cold. As you can see from the log I only have 11.7V when I turn the ignition on (seems pretty low) and it goes down to 9.9V when I press the start button.

Can that be the reason why my engine is starting so badly? It takes about 5 seconds to get it up to run.

Hope somebody can pinpoint me to the problem area and solution.

What can be the reason for this low voltage?


s2000-ap1 AW.kal
My S2000 AP1 calibration (currently based on stock AP1 calibration)
(46.75 KiB) Downloaded 71 times
Cold start.kdl
Log file of cold start with slow engine start
(146.49 KiB) Downloaded 69 times
European Honda AP1
Vortech sc w 14 PSI boost w aftercooler
Hondata KManager Ver.
RC 750cc
AEM 3.5bar MAP
ERL/Aquamist water injection system 2D
Head & manifold ported by Alaniz
3'' custom built exhaust w Berk kat
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Post by Spunkster »

It may be time for a new battery. Batteries only last for a few years, and are adversly effected by cold and heat.