WB vrs NB info

[Bruce]

Just dawned on me you must have missed my posting from a couple weeks ago,
when I mentioned moving the O2 sensor from pre turbo to 4' post turbo, and
lost about 50mv of O2 reading.  No other changes noted, as far as MPG, or O2
cross counts, strange PWs or anything of that nature.

Also, of note that the NB O2s as supplied by GM, vent to atmosphere thur the
air gaps in the strands of wire.  If you doubt this refer to the GM service
bullentin about heat shrinking O2 wire solder repairs.  Or you can try
soldering and heat shrinking the wire on your O2 sensor to see if this is
real or BS.  (I found out before the bullentin, that it's true)  so I'd
suggest you have a good spare handy if you do this.
  Now with this as a given, can you see where they would be backpressure
sensitive?.
how about the lack of not knowing this and making inaccurate statements.
Bruce


> OK, both of those parameters may be very important. EGT and exhaust
> pressure. Instead of dismissing one or the other, I would *REALLY* like
> to understand how these two very important params affect both NB and WB
> sensors. Instead of saying just "these can skew readings", why don't we
> try to quantify the effects? Bruce, do you have any *data* that
> correlates pressure or temps with WB (or NB) readings?

----------------------------------------------------------------------------
To unsubscribe from gmecm, send "unsubscribe gmecm" (without the quotes)
in the body of a message (not the subject) to majordomo at lists.diy-efi.org