NefMoto > Technical > Tuning > Electricuted by Car while tuning.
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Author Topic: Electricuted by Car while tuning.  (Read 6572 times)
eakinsj
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« on: October 01, 2016, 07:32:59 AM »
So last night I was changing the tie rod on my 2.7 and I though oh I can flash my tune while in changing the tie rod.

So I go grab my computer which has a terrible battery life. I plug the charger in and hook the compter up and I get the tune flashing.

I reach in to start adjusting my tie rod and felt a shock on my left hand. I figured I just pinched a nerve or got stabbed by a piece of steel or something. So I reached it again. This time on my other arm I touched the fender and got shocked.

So I went and grabbed my continuity tester and found that somehow the whole car was charged with a.c. power. And I mean the whole car. Any where with bare metal would electrocute you.

Now I'm assuming it is an issue with my laptop but I am not sure. The tune flashed fine and car runs great.
 
Just posted this to see what people think.
And to warn them you're car could be trying to kill you.
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vwaudiguy
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« Reply #1 on: October 01, 2016, 07:36:04 AM »
Was this car on a lift?
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eakinsj
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« Reply #2 on: October 01, 2016, 08:25:32 AM »
No it was on all 4.
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eakinsj
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« Reply #3 on: October 01, 2016, 08:26:42 AM »
What blows my mind is a.c. power should not go past the charging block of the laptop. And I tried 2 different chargers and different extention cords.
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adam-
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« Reply #4 on: October 01, 2016, 11:43:43 AM »
Tried two different chargers and they both make the car hot?
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eakinsj
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« Reply #5 on: October 01, 2016, 03:11:43 PM »
Yes. Blows my mind I just don't understand, how it is even possible. You would think 110 a.c. would fry the motherboard of the pc.
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gman86
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« Reply #6 on: October 01, 2016, 05:20:41 PM »
Switched mode PSU ties -ve against the AC side. Sounds like a poor PSU. There is a filtering cap between the two sides. It's normal to feel a slight "nibble" if on any low impedance body part (sweaty hand/finger) due to capacitive coupling, but not a shock. Sounds like yours is leaking or isn't grounded properly.
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DT
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« Reply #7 on: October 01, 2016, 10:40:28 PM »
Most probably not a shock. Listen to gman86
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Try ME7idatool http://nefariousmotorsports.com/forum/index.php?topic=21130.0
adam-
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« Reply #8 on: October 02, 2016, 11:28:09 AM »
But for both to have failed?
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gman86
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« Reply #9 on: October 03, 2016, 02:19:52 AM »
Quote from: adam- on October 02, 2016, 11:28:09 AM
But for both to have failed?

I suspect it's said "nibble" I was talking about. If true AC was in the vehicle electrical system, I suspect it would hurt some stuff.

I've seen upto 90v float between the -ve output of a PSU and the supply earth. The problem is, there's absolutely zero current available so any sort of load drops that voltage to pretty much 0.
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overspeed
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« Reply #10 on: October 05, 2016, 06:09:52 AM »
Happens the same yesterday with an A3 2002 with M3.8.3 in dynamometer...
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vwaudiguy
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« Reply #11 on: October 05, 2016, 12:04:31 PM »
Shockingly fast!
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"If you have a chinese turbo, that you are worried is going to blow up when you floor it, then LOL."
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