Yes I did the fix to keep the temp needle from pegging while starting the engine. Some have reported the needle falling off the post or stuck itself at max, etc.
I heard other GM cars of that era had the same problem.
Chrysler also had some electrical issues in the 70's. My new 73 Dodge van showed its colors on the first day. With key out of ignition and 4-ways on I could apply the brake and operate all the accessories, wipers, heater, radio, etc. Of course they all worked intermittently thru the flasher. Dealer didn't believe me so I tried it on several vans on his lot to prove my point.
Back on topic, I don't think there was any recalls for the Fiero temp needle pegging out.----- unless you can prove it can start a fire!!
"Kilgore Trout once wrote a short story which was a dialogue between two pieces of yeast. They were discussing the possible purposes of life as they ate sugar and suffocated in their own excrement. Because of their limited intelligence, they never came close to guessing that they were making champagne." - Kurt Vonnegut