Hello! i'm very new to this site so i'm sorry if I mess up somehow.
i'm have troubles with my '84 Trans Am, it's idling horribly and I'm pretty sure its missing. It has a 5.0 carb. V8. When I bought it (Jan 2020) it was a rough idler, but I changed the oxygen sensor and it seemed to have smoothed it out and helped it run cleaner. Now, the day after taking it for a sunday drive with some fellow hot rods, it almost stalled at a stop light and chugs between 1000-2000 rpm; however, it run normally when its cold. I have yet to change spark plugs and wires ( my edlebrook headers are cooking all my wires), but I have ordered them and should be here soon. It also runs smoother when its in park or in neutral, but ticks either way.
also, any recommendations for spark plug wire looms?
Thank you for reading and any help is welcomed and needed!

 

Welcome Aboard!

Beginning with routine maintenance is a good idea. When the spark plugs are removed, pay attention to which plug is removed from which cylinder and their condition. That could be a useful clue about what is happening to cause misfire. As for the wire looms, that would depend upon the size of plug wire. Given that there are headers, that might eliminate a lot of possibilities for wire loom types, like plastic,