Car dies when idling

I turned on my car yesterday, and, to my surprise, it worked -- though felt very underpowered -- and took it to the car shop. I requested an oil-change for starters because I realized my car was low on oil, and I thought this was the culprit -- though it had to be VERY low on oil for it to have rpm issues, something that I just learned. I also had the the manifold tube reattached.

Once done, I drove home and going up hill (I live by Grouse) my car had it's tremors and then bam, it peaked over 2.5 rpms and died. I managed to pull to the side to start it over again, and brought it over to the mechanic shop immediately.

Upon their inspection they found that the air condition tube was the cause of all this mess: the air condition tube was sucking up water and bringing said water internally and as a result my spark plugs all rusted, and my fuel injector, air filter and fuel filter were all soaken wet. Ignition wires were also rusted too. Upon recommendation, the distrubtor cap, ignition rotor, spark plugs, igniton wires, air filter and fuel filter have all been replaced. The problematic tube that was sucking up all the water was removed so I don't have to look forward to internal leaks like that again; however, if car problem still persist, then it would be the fuel injector -- it wasn't replaced but dried, hopefully it didn't crap out because it got wet so i'm going to optimistically hope for the best.

On a higher note, I feel a much more stronger performance of my car, and I was able to drive up the hill no problem.

Fortunately, the shop took kidneys as a form of payment -- the extraction of said kidney was free of charge too -- so it was all good on that end.

Thats a real interesting.Where on earth did you take your car?
I never even herd of that before-
-air condition tube was the cause of all this mess: the air condition tube was sucking up water and bringing said water internally-

All so-? spark plugs all rusted-there made of rubber
just the ends are metal in side the boot,and inside is
made of fiberglass strains coated in graphite.
not much to rust there.would love to help you
with your Fiero if i can.there are lots of people
here that know everything there is to know
about the cool little car-Fiero.one will need a
little more info from you about your car so a good
? guess can be made to just what is wrong.
hope all is good know for you, an running fine.
Snow