Welding - Battery Disconnected or connected?
I unhook the battery and the pcm and un plug any other accesible electronics (pull the dizzy on my blazer to) just to be safe, or snap on makes a suppresor that you hook up to the battery to protect every thing.
i didn't and i did a full 6 point and true duals on the car.. I'm fairly knowledgible with electronics and the welder completes its own circuit... how could it effect battery voltage or surges??
TECH Veteran
Joined: Aug 2002
Posts: 4,055
Likes: 1
From: Hartsdale, NY
I thought - yes dissconnect for ARC (electric) welding
No for gas (oxy) welding.
I lost a PCM a few years back so I disconnect the battery every time I work on the car. I also have LS1Edit which is locked to the specific PCM in my car - a super pain if it goes bad...
No for gas (oxy) welding.
I lost a PCM a few years back so I disconnect the battery every time I work on the car. I also have LS1Edit which is locked to the specific PCM in my car - a super pain if it goes bad...
We do subframes all the time, and it only takes one fried PCM to begin unhooking the battery.
On the race car, it has a kill switch. We still unhook the PCM just to be safe.
Maybe Harlan can give some insight on this subject
On the race car, it has a kill switch. We still unhook the PCM just to be safe.
Maybe Harlan can give some insight on this subject
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Thread Starter
TECH Enthusiast
Joined: Apr 2003
Posts: 561
Likes: 0
From: silver Spring MD
Hi Folks
I did disconnected my battery when I welded last weekend. the funny part is when I started the car up again, it would run correctly, it keep stalling - I was worry but after driving it for a couple miles it went back to normal operation. I would rather be safe then sorry.
Bill
I did disconnected my battery when I welded last weekend. the funny part is when I started the car up again, it would run correctly, it keep stalling - I was worry but after driving it for a couple miles it went back to normal operation. I would rather be safe then sorry.
Bill
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Originally Posted by Bill's 02 Z-28 SS
Hi Folks
I did disconnected my battery when I welded last weekend. the funny part is when I started the car up again, it would run correctly, it keep stalling - I was worry but after driving it for a couple miles it went back to normal operation.
I did disconnected my battery when I welded last weekend. the funny part is when I started the car up again, it would run correctly, it keep stalling - I was worry but after driving it for a couple miles it went back to normal operation.
Anyway, as it turns out, another guy in the shop actually did the work on my Formula and disconnected the battery because he wanted to be on the cautious side. I was kinda glad that he did.
However, when they pulled it out of the garage, the darn thing would not hold an idle. The guys in the shop just said that it was normal, and that the car would need to relearn its idle. At first, I didn't believe him, but by the time I got home, she was running like a champ!
Launching!
Joined: Apr 2003
Posts: 272
Likes: 0
From: Cincinnati, Ohio
Originally Posted by robertbartsch
Didn't someone say the Helms manual suggests disconnecting the battery for welding and other work too!
If it took 20 minutes versus 20 seconds, I might get lazy, but why fuss over something you can do in under a minute? As a caveat though, pay attention when you take your car to the muffler shop... they don't pop the hood before they start welding, if you know what I mean.
