The can is an '86 Monte Carlo LS with a 305 and computer controlled
Quadrajet (TPS + MCS). The O2 sensor reads at idle -2000 RPM ~.04v - .07v.
I
don't know if that is incorrect or not, but my feeling is that it should
be
reading higher given the sensor has a range of 0v - 1v. If I pump the
throttle several times very quickly it will read .9v - 1v, which is
correct.
At idle and a raised RPM when it reads under .1v the mixture is definitely
rich. It smells pig rich out the exhaust, and with the sensor disconencted
while I was testing it even smoked a bit from being rich. The car does run
a
bit smoother with the sensor plugged in though and doesn't smell as rich.
Either the sensor is reading false lean and the computer is compensating
by
richening it up or the carb is not adjusted properly. I have gone through
the carb and it should be very close.
Is the sensor bad?? It looks like with the rust it's gonna be a pain to
get
it out. I'm afraid I'll strip it or something. In any case, what should
the
O2 sensor be reading for a normal mixture and for a somewhat rich mixture
and is my sensor bad?
