do i need to un plug the ecu or the un hook the neg batt cable or any thing like that? i hung out at a muffler shop for a bit they did mig only but didnt unplug any thing is it ok to mig/tig on a car with out disconecting any thing electrical ?

iam going to fab up a front strut tower bar for my 8th gen civic soon and just wanted to know before i start

i was thinking of tac welding all the peacies while on the car and the finish welding it off the car what do u guys think

and i did a quick search on HT didnt find any thing sorry if this has been coverd before

 

Im no welder but i think get what you are thinking. Why not just unplug it if you have any doubt. It takes no more then 5 minutes probably to complete both tasks.

 

I'd do it to be safe, like he said, it only takes a few seconds. Make sure you have the radio reset code if its the stock stereo, or make a 9v battery on a cig lighter plug to keep the radio alive.

 

so u think i can just take off the neg batt cable or schould i unplug the ecu as well
or both

 

Do it to be on the safe side....I always do.

 

ok thanx guys well i went to make some templets this morning and after removing a plactic cover i found that i already have a factory strut bar lol guess iam going to look for somthing else to make

 

I've been to a muffler shop before that connected a device to the battery before they started welding, called a surge supressor/protector. here's a link to one http://www.toolweb.com/AutoBod...30818, and I'm sure you can find more on the web. This makes it so you don't have to disconnect the battery so you won't have to enter any security codes, etc. etc.

 

i would remove the whole computer from the vehicle

 

saw your sig that your selling your xbrace and the strut bar, ill take both, pm me bro...

 

unless you are welding exhaust, you should definitely unplug the battery, and/or remove the ecu. removing the ecu is not completely necessary but your welder could quite easily fry it and then where would you be?

when i do exhausts i don't unplug the battery but i keep my ground clamp as close to where i'm welding as possible. this is kind of cheating though. i know it's not going to arc through the muffler, down the exhaust, through the rubber hangers and rubber motor mounts to put a surge in to the system that the fuses can't handle.

when i do anything on a frame or bodywork, the ecu get's pulled or the battery gets pulled. nothing like having to replace someone else's ecu.


Modified by cua0 at 10:05 PM 7/5/2007

 

this shouldt even be a question, if theres any doubt, take it out.

 

I never remove them from the car but I always unplug the ECU and battery I don't know if you have to but I don't want to find out.

 

why don't you just mock it up, without tack welding to the car?

I.e.: figure out the circum/holes of ur strut tower plates, cut/drill them out, sticked them on, figure out where ur flanges are going to be, make/weld on the flanges..then put those on, then measure the distance between? or something? it may seem like more work, but i mean, its better than cleaning/re-painting all those tack weld marks, no?

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by cua0 &raquo;</TD></TR><TR><TD CLASS="quote">unless you are welding exhaust, you should definitely unplug the battery, and/or remove the ecu. removing the ecu is not completely necessary but your welder could quite easily fry it and then where would you be?

when i do exhausts i don't unplug the battery but i keep my ground clamp as close to where i'm welding as possible. this is kind of cheating though. i know it's not going to arc through the muffler, down the exhaust, through the rubber hangers and rubber motor mounts to put a surge in to the system that the fuses can't handle.

when i do anything on a frame or bodywork, the ecu get's pulled or the battery gets pulled. nothing like having to replace someone else's ecu.


Modified by cua0 at 10:05 PM 7/5/2007</TD></TR></TABLE>
Cause you don't have ground wires from the engine to the chassis?

 

I never unplug the battery or ecu, never had a problem.

 

I built a waterjet machine and drained the water out after leaktesting it. As i had the pump going i decided to weld some more stuff to the outside of the tank and it burnt the pump up. oh well... haha

 

Just keep in mind of the current path.

Mostly it will never be a problem.


Current just doesn't magically flow into an open circuit. It follows the path of potential.

 

yeah, so dont ground on your ECU, haha