850 Air Pump ñ Check Engine Light Topic is solved

[Polara]

CAR: 1997 850 GLT Wagon - 75000 miles

PROBLEM:

Air pump sounded like a fork stuck in garbage disposal at every cold
start, is now not running at all. Check engine light is on.

QUESTIONS:

1. Is there any way to permanently disconnect or disable air pump
without triggering check engine codes or other engine or ECU problems?
I live in warm climate (Los Angeles) so air pump does very little good
and repair is $$$.

2. Is it true that "fuel trim" is disabled when check engine light is
on? What happens if you keep driving like this?

[nightshift]

You will probably get a lower mpg with the fuel trim adjusted. I would try and maybe find a used pump to save a few bucks. Since everything is dependent on another component, as far as info going to the ecu, it would be easier just to replace the pump.
I would do a search on the net and see what used parts you can find, since there are some good deals out there, even try ebay motors.