zj..more problems
 

yep. more. hehe.
96 grand cherokee, all time 4 wheel, 5.2 v8
ok first one.
failed emissions test. running too rich. since i recently replaced the O2
sensor, i am
understanding that a failing sensor will make the computer open up to full
rich
on the fuel mixture. and it would also account for my crap fuel milage i
have been
getting. do i replace sensor again and be more careful this time? and
ideas?

second one.
(this is not a constant thing, just occasional occurance)
really odd shifting behavior. at odd times, it seems as first gear just
does not
exist. runs as if you are starting out in second gear while slipping the
clutch
way too much. just no 'guts' to the takeoff when this occurs. stomping on
the
gas does not make the jeep downshift to a lower gear, and turning off the
overdrive does nothing either. this can occur while driving in stop and go
traffic mostly. sometimes, if i stop the jeep, turn it off for a bit, (to
run into
a store, for example) and start again,the problem is gone. there is no
noise
associated with the problem, no sudden unexplained jerks or shifts.
i am assuming at this point a computer control problem, or maybe faulty
vacuum line or? im stuck on this one.

now, both problem started roughly the same time, so is it possible they are
somehow related? i dont see how, but stranger things have happened.
thanks for any help
Tim in colorado