so my 2005 acura mdx cranks slow and most of the time starts but there’s been times where it didn’t. The battery tests come back good. 12.6 car off, 10.5 while cranking, and 14.2 when running so alternator should be fine to. I also had autozone test it with a machine and everything including the sta…

Replaced the starter and it fixed the problem. If anyone is having a very consistent slow crank but engine is starting, replacing the starter fixed it for me.

[image] maxokream: but what is the most efficient way to test the cables, grounds etc? You inspect the connections between the battery and the starter and the battery to ground. Tester

[image] maxokream: but there’s been times where it didn’t. What did it do? just click? [image] maxokream: test it with a machine and everything including the starter came back fine. Was it slow cranking while being checked also and still tested good?

no when it didnt it would just very slowly crank and not start. and yes the slow crank is very consistant it was slow cranking when i tested it (10.5 while cranking) and when the autozone machine tested it

There is a ground the connects to the frame near the front I think and one that connects to the engine block. I will check those and clean them and also check the positive connection to the starter making sure its tight before I go ahead and replace starter. thanks

Also check the connection at the starter. Tester

[image] maxokream: the slow crank is very consistant it was slow cranking when i tested it (10.5 while cranking) and when the autozone machine tested it Did anyone measure the amperage draw? I don’t think Autozone does that. 10.5 volts while cranking was normal 50 years ago, starter motors t…

[image] Nevada_545: measure the amperage draw the engine starts basically every time just cranks slow

the battery is 12.6 with engine off every time i check it. if there was an amperage draw wouldn’t the battery be dead or lower than 12.6 every time I check it?

Measure the amperage draw of the starter motor while cranking the engine, should be about 100 amps.

Your shop could measure the voltage right at the starter motor terminals. Ask them to measure both the thick and thin wires, when the key is in start. Probe directly between the terminal and the starter motor case. What voltages do they measure?

2005 acura mdx slow crank

Maintenance/Repairs

davesmopar September 20, 2023, 1:11am 19

Here is a pretty good video of how a modern day starter works…

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2005 acura mdx slow crank

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