Takes forever to turn over, sometimes won't start. - Miata Turbo Forum - Boost cars, acquire cats.

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Old 05-26-2013, 02:34 PM   #1
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Default Takes forever to turn over, sometimes won't start.

After sitting this winter, my Miata has a hard time turning over and starting. The battery is new and the alternator tests fine. I can't seem to figure out why it's slow to turn over. It sounds like a dying battery, but the voltage checks out good.

Where in Tuner Studio can I check/adjust the settings? Anyone have a screenshot of recommended settings? I replaced the battery this spring with a smaller one than the one that was in last year.
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Old 05-26-2013, 04:38 PM   #2
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Don't bother telling us which MS you have or the cranking Amps on the new smaller battery... or posting a datalog of the problem.
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Old 05-26-2013, 05:10 PM   #3
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Quote:
Originally Posted by southernmx5 View Post
Don't bother telling us which MS you have or the cranking Amps on the new smaller battery... or posting a datalog of the problem.
MS3x with 330 cranking amps.

I'll see if I can get a datalog tomorrow.
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Old 05-26-2013, 07:34 PM   #4
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Compare your settings with the diy base map. Make sure the cranking rpm is set to at least 300 to prevent the MS from entering ASE too early.

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Takes forever to turn over, sometimes won't start.-ms3cranking.jpg  
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Old 05-28-2013, 10:36 PM   #5
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May need to get the battery load tested
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Old 05-28-2013, 11:29 PM   #6
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Yep. Load test the battery. Miata batteries seem to have short lives.

Also, inspect the condition of your battery cables. They're not very big, but they are long (bad combo).
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