[Diy_efi] Welding on cars w/ ECU's??

[Toyota Supra]

i am interested to hear explanations to this as well, although from what i 
have been told, you really should not TIG weld (or square wave weld) at all 
on the car, whether the cables are connected to the battery and chassis or 
not.
it can also damage sensors as well

-j





From: "Chris Spies, ATI ProCharger" <proddev at procharger.com>
>Reply-To: List for general do-it-yourself EFI talk <diy_efi at diy-efi.org>
>To: <diy_efi at diy-efi.org>
>Subject: [Diy_efi] Welding on cars w/ ECU's??
>Date: Fri, 31 Jan 2003 14:26:33 -0600
>
>Can anybody explain to me why it is you can not (at least the aftermarket 
>manufacturers prefer that you not) weld on a vehicle while the ECU is 
>connected (electrically) to the vehicle?  It seems that muffler shops weld 
>on vehicles with factory ecu's all day long without trouble, however I have 
>heard many horror stories of damaged aftermarket ECU's and ignition boxes 
>when somebody neglected to disconnect the harnesses?  I have never really 
>been given a good answer, I just follow the rules and hope to avoid 
>disaster...
>
>-thanks
>-Chris
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