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Difficult to start once warm. Bad starter?

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Difficult to start once warm. Bad starter?

 
Old 12-03-2015, 03:02 PM
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Do you have any aftermarket electrical equipment on the car? Ones that may be causing a parasitic draw? Esp during starts? (gauges, audio equipment, aftermarket lighting, etc).
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Old 12-03-2015, 03:03 PM
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Originally Posted by windhund116 View Post
Do you have any aftermarket electrical equipment on the car? Ones that may be causing a parasitic draw? Esp during starts? (gauges, audio equipment, aftermarket lighting, etc).
Only thing I have is an Escort Redline radar detector. Everything else is stock.
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Old 12-03-2015, 03:16 PM
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Hmm... Radar detector shouldn't draw a lot of current. Engine is stock, right? No turbo or supercharger? Stock pistons and compression?
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Old 12-03-2015, 03:18 PM
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Originally Posted by windhund116 View Post
Hmm... Radar detector shouldn't draw a lot of current. Engine is stock, right? No turbo or supercharger? Stock pistons and compression?
Yep. Just intake/exhaust. Not sure about the clutch/flywheel though.
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Old 12-03-2015, 03:19 PM
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Hmm... is the clutch heavy compared to other S2000s? Do you have the clutch-starter switch bypassed?
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Old 12-03-2015, 03:21 PM
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Originally Posted by windhund116 View Post
Hmm... is the clutch heavy compared to other S2000s? Do you have the clutch-starter switch bypassed?
The clutch is most definitely heavier than my roommates presumably stock AP2 clutch and my other Exedy Replacement. I do not have a clutch-starter switch bypass installed.

I did read something about installing that to save the thrust bearings on heavier pressures plates?
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Old 12-03-2015, 03:30 PM
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Maybe worth a try, if you've already checked all possible electrical issues.
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Old 12-03-2015, 07:21 PM
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Originally Posted by flanders View Post
You could start to check the electrical connections between the battery and the starter.
Switch the multimeter to ohms (omega symbol) and then cross both probes together to check the "zero" you should see 0.0 or 0.1ohm.
Then you put one probe on the battery negative and the other somewhere on the engine block, you can try multiple places.
You might see a ~0.1ohm higher value but it shouldn't be much more.
After that you put one probe on the positive terminal and the other probe on starter motor terminal, you should see a similar low resistance value here as well.
Also while you are doing these measurements it's a good thing to pull and wiggle a bit on cables and connections to see if there is a change in resistance.
I put the two probes together and saw 0.0 - 0.1 ohm.
When I put one probe on the negative terminal and one probe on the block I was getting anywhere from .2-.7. At one point it settled at .5. What does this mean?
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Old 12-03-2015, 08:09 PM
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Maybe, slight resistance (electrical contact) between block and body. 0.5 ohms is insignificant, IMHO.
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Old 12-03-2015, 08:24 PM
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Originally Posted by windhund116 View Post
Maybe, slight resistance (electrical contact) between block and body. 0.5 ohms is insignificant, IMHO.
OK. Just checked it while warm and it was 0.0 spot on.

I'm in the processing of trying to swap a good battery immediately after the symptoms appear... Will update tonight with some videos hopefully.
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