Q: Car cranks slowly when it is hot, but cranks normal when the engine is cold

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When ever the engine runs for a while and becomes hot, it starts very slowly or not at all until when it is left to cool.

My car has 160000 miles.
My car has an automatic transmission.

Hello. The most common cause of a slow hot crank is a bad starter. As the brushes and the armature in the starter wear they begin to bind then the starter is hot causing this slow start. It can also be from a failing positive battery cable that has a lot of internal resistance. I usually check the cable by doing a resistance and voltage drop test. If it is fine then I do an amperage draw test of the starter and then replace the starter as that is the most common problem. If you want to have this starting problem repaired, consider YourMechanic, as a certified mechanic can come to your home or office to diagnose and repair this.

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