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Old 08-16-2021, 02:38 AM
jonbmw jonbmw is offline
Join Date: May 2020
Location: Estonia
Posts: 4
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Originally Posted by andrewwynn View Post
Most likely correct assessment.

Common failure mode of a starter is to pull more and more current add it fails. It presents with the symptoms you described.

Get a measurement of the current draw when starting.

It should be in the range of 225-275A. When failing they can be 350-400a.

225a is my gas 3.0 on cold start, 185a on immediate restart. I'm suspecting the second attempt the engine has enough oil in the right places to get that drop in torque required.

It can take years to slowly fail and the only symptom is it cranks slower and take longer to start (though it will often take out an aloder weaker battery so more often than not people replace the battery first not realizing it was the starter not the battery in the first place. )

Start the car with a fully charged battery but also jumper from another running car.

If it starts fast almost certainly the starter.

I will try to get a hold of a meter to measure the amp draw.
But regarding the slower cranking, I can't say that I'm noticing this. It's more like cranks fine or cranks fine just for a sec then stops. It will only crank slower when it's winter time or battery is low from not driving (it has a parasitic draw somewhere...).

I will also try to fully charge the battery and jumper when starting. I'll see if this makes a difference.
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