Common voltage drop during cranking
06-11-2019, 07:31 PM
#1
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Common voltage drop during cranking
From an old topic started earlier in the year, I was having cranking issues. tl;dr, I killed the battery from the repeated failed tests earlier in my megasquirt experiences. Battery is replaced, and car hasn't needed a jump start since then. Regardless, it does feel like my car takes "longer" to start. It "feels" like it might not start at some point. Regardless, I've seen other datalogs posted here, and the voltage drop I get doesn't seem to be all that common (see attached).
Battery typically is sitting at ~12.5V, and when I crank, it drops down to 9.2-9.5V. Is this normal? If not, where should I start looking? Battery and starter terminals look good.
Battery typically is sitting at ~12.5V, and when I crank, it drops down to 9.2-9.5V. Is this normal? If not, where should I start looking? Battery and starter terminals look good.
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06-12-2019, 11:03 AM
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From an old topic started earlier in the year, I was having cranking issues. tl;dr, I killed the battery from the repeated failed tests earlier in my megasquirt experiences. Battery is replaced, and car hasn't needed a jump start since then. Regardless, it does feel like my car takes "longer" to start. It "feels" like it might not start at some point. Regardless, I've seen other datalogs posted here, and the voltage drop I get doesn't seem to be all that common (see attached).
Battery typically is sitting at ~12.5V, and when I crank, it drops down to 9.2-9.5V. Is this normal? If not, where should I start looking? Battery and starter terminals look good.
Battery typically is sitting at ~12.5V, and when I crank, it drops down to 9.2-9.5V. Is this normal? If not, where should I start looking? Battery and starter terminals look good.
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