When I first installed my SS header kit, I noticed a definite improvement in
performance.  Now after a few months, I've been noticing a gradual loss of
that newfound horsepower.  So, I figure it must all have to do with a leak in
the exhaust somewhere affecting that pesky O2 sensor.  But, I can find no
leak. So, I try running with a disconnected 02 sensor (which is also fairly
new).  Seems to be running real nice without it.  My questions are; 1) can I
screw anything up by running like this? 2) Do I have to adjust the AFM or
throttle or anything to run like this, especially if it's apparently running
well? 3) is the 02 sensor only important before the engine reaches optimum
temperature?

Thanks,
Brian Doss
'88 Weekender, Queequeg