Re: Ground Loops (non aviation)

[Scot Sealander <Sealand@clarityconnect.com>]

Bruce Plecan wrote:
 
> On grounding:
> GM seems to ground all the ecm stuff thru one point on the engine.
> Somestimes on the heads, sometimes on the intake.  I would **ASSUME**, this
> is to prevent ground loops?.  Is the reason cause of where the alternator is
> grounded there, or the mass of the block to act a sort of a capacitor, or
> what?.  Would there be a big difference in grounding things at the firewall,
> and relying on the original ground strap, and battery cable to be the
> grounds?.....

One would think that the O2 sensor ground would be nearest the
engine block ground....  Any large offset to the firewall would really
mess that up.

Scot Sealander
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