Distributor cap

Hi guys,
I replaced my cap and rotor, one wire at a time and now my car won't start, just back fires. I've done this before on other cars with no problems. I got out and had a look. I noticed that there was part of a zip tie in my carb. I had to cut off a bunch of zip ties that were holding my wires together and I thought I did it really carefully, but I guess not. I was able to get it out with some needle nose, however it still won't start. It's pretty sad... Could I have mixed up a wire or is it my carb acting up from the zip tie? Any ideas??
Thanks