replaced all ignition parts on distributor checked all wires and connecters.still no spark?
no spark on 1990 Pontiac Firebird
This may sound dumb but is the distributor shaft turning? Double check and make sure it is. If the distributor is turning and you still don't have spark then it may be time to get your Firebird to a qualified technician.
I have an 89 fbird and had the same problem. Alex (mechanic in Arlington TX 469-471-7236) fixed it for me. This guy speaks with a strong accent but he knows his stuff.