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Old 08-04-2022, 04:03 AM   #1
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Default Need help - PCV valve sparks?

I was trying to remove my PCV valve with the radiator hoses/power steering pump out of the way, without removing the tire, and after a few minutes of trying to get a wrench on it I suddenly saw/heard a small burst of sparks right from the PCV valve fitting I was attaching the wrench to.

Obviously I still had the battery connected, which in hindsight I guess should always be disconnected even when not working on fuel/electrical, but what the hell could have caused sparks on a mechanical part like the PCV valve?

Did the bottom of the wrench touch the wire coil on the alternator, and if so would that cause sparks even with the engine completely off? I really want to know what caused that, both for my own sanity, and to avoid doing it in the future (and helping diagnose a problem if I just fried the alternator or something). Any thoughts or ideas would be awesome….I tried searching and found nothing.
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Old 08-04-2022, 04:12 AM   #2
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I’m guessing I did this?

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Old 08-04-2022, 11:18 AM   #3
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Yes, sounds right. Hopefully you did not fry anything -- I'd check the battery charge/voltage often.
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Old 08-04-2022, 12:01 PM   #4
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I should just monitor it when I restart the engine for the first time, correct? If battery maintains charge, that means alternator is charging it successfully?
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Old 08-04-2022, 01:20 PM   #5
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Quote:
Originally Posted by USCGamecocks20 View Post
I should just monitor it when I restart the engine for the first time, correct? If battery maintains charge, that means alternator is charging it successfully?

Check voltage across battery terminals with engine running about 2000 rpm to check charging system; should read about 13.5 to 14.5 volts.


DO NOT DISCONNECT EITHER OF THE TRUCK'S BATTERY CABLES WHILE THE ENGINE IS RUNNING THOUGH !!!
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Old 08-04-2022, 01:50 PM   #6
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Quote:
Originally Posted by Cusser View Post
Check voltage across battery terminals with engine running about 2000 rpm to check charging system; should read about 13.5 to 14.5 volts.


DO NOT DISCONNECT EITHER OF THE TRUCK'S BATTERY CABLES WHILE THE ENGINE IS RUNNING THOUGH !!!
Perfect, thanks, will do exactly that once I get everything back together. Much appreciated.

Also, I would never disconnect the battery while running haha, but what would happen just curious?
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Old 08-05-2022, 04:05 AM   #7
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Quote:
Originally Posted by USCGamecocks20 View Post
Perfect, thanks, will do exactly that once I get everything back together. Much appreciated.

Also, I would never disconnect the battery while running haha, but what would happen just curious?
You will lose the magic smoke from many items on your truck. Creates a massive surge that knocks out anything electronic.
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Old 08-05-2022, 09:03 AM   #8
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You will lose the magic smoke from many items on your truck. Creates a massive surge that knocks out anything electronic.
Thanks, and I got scared at first thinking you were responding to my “arc’ed the alternator” comment, and that I fried all of my electronics haha. Had to read my last question again.
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Old 08-05-2022, 10:29 PM   #9
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Originally Posted by Midnight Tech View Post
You will lose the magic smoke from many items on your truck. Creates a massive surge that knocks out anything electronic.
This is true. Electronics run on smoke. when you release the smoke, electronics simply stop working... and getting the damn smoke back in is, at best, difficult.

I tried for over 20 years in the IT world... but when it's a PEBCAK, not much can be done.

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