welding repairs to a frame? - F-Body Road Racing and Autocross Forums

I have discovered a couple of dime sized rust holes in the frame on my '87 Toyota 4Runner. I've already had a friend cut some patch panels out of 1/8" steel that I intend to weld to the frame. I have good steel within an inch or less of the holes, so I'm not really worried about any substantial damage. (Although I will be keeping a closer eye on it). My question is whether or not grounding my mig welder to the frame will cause the computer any issues. I've heard that since the truck's computer also grounds to the frame, you can cause damage to it. I heard this a long time ago, so it may have been debunked by now. It's easy enough to pull the negative cable to shut the computer down, I just wondered if any of you had ever heard of this?

rpoz-29 View Member Profile	Apr 7 2005, 10:05 PM Post #1
Advanced Member Group: Advanced Members Posts: 620 Joined: 24-December 03 From: Chester, VA Member No.: 22	I have discovered a couple of dime sized rust holes in the frame on my '87 Toyota 4Runner. I've already had a friend cut some patch panels out of 1/8" steel that I intend to weld to the frame. I have good steel within an inch or less of the holes, so I'm not really worried about any substantial damage. (Although I will be keeping a closer eye on it). My question is whether or not grounding my mig welder to the frame will cause the computer any issues. I've heard that since the truck's computer also grounds to the frame, you can cause damage to it. I heard this a long time ago, so it may have been debunked by now. It's easy enough to pull the negative cable to shut the computer down, I just wondered if any of you had ever heard of this?