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post #1 of (permalink) Old 12-10-2002, 06:21 PM Thread Starter
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A general welding question

I got my stick welder all wired up to my drier outlet and i been testing it and all is fine, no breakers popping, melting cords or fires behind the drywall [img]images/graemlins/shocked.gif[/img], so im ready to fix some crap on my truck tommorow, anyways - i have never attempted to weld anything *on* an EFI vehicle, should i disconnect the batt terminal or do i have nothing to worry about?
I was concerned about the sensitivity of the PCM basically, i realize im only working on chassis ground but wanted to check with someone else first.
Im gonna tack weld the front crossmember, just in case its flexing, fix my loose tailpipe and try to incorporate the center section of my classIII hitch into my custom rear bumper. More mods to come [img]images/graemlins/cool.gif[/img]
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post #2 of (permalink) Old 12-10-2002, 08:18 PM
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Re: A general welding question

Always disconect the batt. And I wold also disconnect the computer too. Whenever I weld on my truck (or things attatched to my truck) I unhook the batts, computer, and the expensive sensors on my Powerstroke.

The sensors might be a little overkill, but I dont want to take any chances with them.
post #3 of (permalink) Old 12-10-2002, 09:27 PM
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Re: A general welding question

You ever see Midas, Meineke, or any other muffler shop guys pulling computer or battery wires? I wouldn't worry about it. It's only ~27V - the static that jumps off your finger when you slide off the seat is higher than that.
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post #4 of (permalink) Old 12-10-2002, 11:19 PM
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Re: A general welding question

uhhh yeah, static strong enough to arc is like 30,000 volts [img]images/graemlins/blush.gif[/img] [img]images/graemlins/smirk.gif[/img]

as long as you dont accidently hit a non-ground wire, you should be AOK
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post #5 of (permalink) Old 12-11-2002, 08:10 AM
Shilo
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Re: A general welding question

My local exhaust shop pulls the batt cable every time. Just remove the neg batt cable, it only takes a second. That's all I've ever done on my EFI 351 and never had a problem. My buddy with EFI 302 in his Scrambler does not disconnect the batt, but it's cheap insurance IMO
post #6 of (permalink) Old 12-11-2002, 12:51 PM
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Re: A general welding question

Some people do, somepeople don't, I don't, but thats just because i am used to customers yelling at me for looseing their radio presets.
I have welded on TONS of cars, never friend one computer, *knock on wood*
post #7 of (permalink) Old 12-11-2002, 02:21 PM
FordDiesel
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Re: A general welding question

Yea, I've only known one guy who fried his computer wile welding on his truck (the bumper). It's a real small chance that you'd do that, but it's one I'm not willing to take. Them computers are expencive.

The way I see it is: It probably wont hurt anything with it all hooked up; but it deffinatly wont hurt anything with it disconnected. And it only takes a min. or two to disconnect them.
post #8 of (permalink) Old 12-12-2002, 12:07 PM
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Re: A general welding question

Yup, it only takes one, if i ever fry one, I will probally start disco- the battery too
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