The AUSubaru.com.au Forums

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

I disconect the ecu these days ( to be safe )

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

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.

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

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.

Thanks guys.

Dave, Count me in.


rob

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