# ECU Help **URL:** \ **Category:** SON240sx Automotive\ **Created:** [October 12, 2008, 6:48am UTC](https://forums.speedlife.net/t/ecu-help/119111 "2008-10-12T06:48:34Z")\ **Posts on this page:** 3\ **Page:** 1
**Author:** ![jacktherabbit](https://avatars.discourse-cdn.com/v4/letter/j/22d042/32.png) [@jacktherabbit](https://forums.speedlife.net/u/jacktherabbit)\ **Post date:** [October 12, 2008, 6:48am UTC](https://forums.speedlife.net/t/ecu-help/119111/1 "2008-10-12T06:48:34Z")
Hey i am wondering if someone on here knows if my ecu will be shout? senerio: i was welding the rockers on my 92 240sx on the drivers rear all day when i realized that i left the battery hooked. I have heard that if you leave the battery attached when welding on the car, you will blow the ecu. is this true? I know a good way to test it is turn the car on but theirs no tranny in the car so it wont start. I would like to know if its a good chance to be gone or if theirs a way to check without starting the car before i sell my spare ECU. Thanks for the help ---
**Author:** ![kollo](https://yyz2.discourse-cdn.com/flex034/user_avatar/forums.speedlife.net/kollo/32/5661_2.png) [@kollo](https://forums.speedlife.net/u/kollo)\ **Post date:** [October 12, 2008, 6:54am UTC](https://forums.speedlife.net/t/ecu-help/119111/2 "2008-10-12T06:54:01Z")
i welded my frame on my 92 hatch with the bat connected no problems ever. ---
**Author:** ![kimmerkaze](https://avatars.discourse-cdn.com/v4/letter/k/9d8465/32.png) [@kimmerkaze](https://forums.speedlife.net/u/kimmerkaze)\ **Post date:** [October 14, 2008, 10:58am UTC](https://forums.speedlife.net/t/ecu-help/119111/3 "2008-10-14T10:58:37Z")
jack, i welded up my ds rockers all day once, and patched the rails…both separate times without disconnecting and ecu’s fine. i guess there’d still be a chance but i think you’ll be ok.