Welding query

robdddd · Post by **robdddd** » Fri Nov 23, 2007 11:37 pm

A Basic Question ......... Is there anything you need to do if you are arc welding on a fuel injected vehicle?

I was told years ago to disconnect the battery?

thanks

rob

seagull · Post by **seagull** » Sat Nov 24, 2007 12:22 am

I disconect the ecu these days ( to be safe )

SuBaRiNo · Post by **SuBaRiNo** » Sat Nov 24, 2007 1:01 am

Battery and ECU to be double safe.

I don't mean to high jack but i forgot to ask u the other day if you were coming to the BBQ Rob. If you haven't read it all ready it's in the WA trips section.

Dave

Point · Post by **Point** » Sat Nov 24, 2007 2:04 am

i did some welding on one of my cars a few years ago with just the ecu disconnected, but not the battery. when i tried to start it a few hours later it was dead flat.

Clearwater99 · Post by **Clearwater99** » Sat Nov 24, 2007 5:55 am

also make sure that you keep the earth close to the weld area .

Gannon · Post by **Gannon** » Sat Nov 24, 2007 6:41 am

The problem is voltage drops between grounds on the vehicle

If you weld at the engine, and put your welder earth clamp say halfway along the car. The current will take parallel paths to get to the earth clamp with least resistance, that might mean through the cars electrical wiring.

For welding exhaust piping, your pretty safe as long as you earth clamp close as possiable to the work.

I always just hook up my jumper leads to the battery (they have a surge protector built in.

robdddd · Post by **robdddd** » Sat Nov 24, 2007 8:16 am

Thanks guys.

Dave, Count me in.

rob

PeeJay · Post by **PeeJay** » Sat Nov 24, 2007 9:31 am

I've never touched anything. Just have a fire extinguisher at the ready and watch where you put the earth.