Did you check your plug wire on the #1 cylinder? Check the insulator that goes down to the plug. Look for small burnt holes or "tracks" of burnt spots.

One easy way to test the wire is to tape up the extension part of the wire that goes into the head with some electrical tape, reinstall the wire and start the car up. If it's still missing pull the wire back out and see if there are any holes burnt into the tape! Makes it easier to see if the hole is small.

If the miss goes away then the tape is holding and you know for sure it's the wire!

Have you check to see if you are getting a signal from the ecu to that injector? You need a noid light to plug into the #1 injector wire. It will blink if the ecu is sending a signal when you start the car. Rare but I've seen them do it. You can get the light at your local NAPA there under $10.