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For the last few days the Black has been throwing a e041c then e041h over and over. As soon as I would clear it out, back it would come. Also would throw an e027 and e028 both current, then history. Also developed a power steering fluid leak this morning, all on the way to meet 2seater for a hike at Gibson's. At any rate we met and got what we wanted and and then we took a look at the cam sensor [cause of the e041 code] and saw that the connector had a highly corroded pin. So off to my house for some contact cleaner and to call the repair shop about the fluid leak. We also by spraying the connection on the cam sensor fixed the code situation and it also cleared up the other two codes as well. Worked out pretty good. 2seater also had that conversion fitting to convert the early "hose" Teves to the later "tubing" Teves pump and motor. Oh and the leak? Turns out to be a bad connection between the hose and the power steering cooling pipe. So that should be all good now as well.

That's right. I was just doing a "test" to see if anyone was awake, and you were. However a number of people think of me as Superman, so if I am, that gives me extra vision to see through engines and still make it an easy see...

I've had a hairline crack in a plug insulator before. My brother-in-law brought me his Mustang to tune it up back in the '70s. He bought all new points, plug wires, filters and distributor cap at NAPA and the spark plugs at Walmart because they were on sale. I installed them and the little inline 6 cylinder engine ran like crap. I spent three of my evenings after work tracking down a spark plug with a hairline crack. I used the same method of pulling plug wires off one at a time to find it. I might have cracked it someway myself installing the plugs but since then I have never even considered buying a spark plug from Walmart.

Sometimes getting down to basics and using old school troubleshooting pays off. Glad to hear you found the problem!

I FOUND THE PROBLEM!!!! I did what ronnie mentioned (can't believe I didn't think of it earlier) which was to pull each wire off until it doesn't make a difference to idle quality. So turns out, as a matter of coincidence, on cylinder 4 I had a bad spark plug wire so I swapped it with another set I bought from a 91. After I swapped the wire it started making a ticking sound. So I pulled the plug and found it was cracked down the insulator. I've never seen that before. I will attach a pic of the plug. On a side note if any one reading all this in the future is swapping over to the Delco ignition set up I HIGHLY recommend buying a spark plug wire set from a 91 reatta. They fit beautifully and make a nice solid connection. Thank you every one for your help! You guys are miracle workers! I learned so much about this car with your guy's help! I will admit my troubleshooting skills have certainly perished from not getting enough sleep due to working night shift and all your guy's help in steering me is greatly appreciated!

I'll be darned, I found my photos of under the hood of the Fiero. Details are listed on the car show placard. I was sorta close?