1 is near the firewall I think. The odds are it is the coil not the injector. There are 2 coils: one fires 1 and 4 and the other fires 2 and 3. I would swap the coils and see if the misfire moves to 2 or 3. That was the case on mine. And the common wisdom is to replace the "connectors" that are under the coils also. They look like rubber dog bones. Good luck.

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1998 C230 330,000 miles (currently dead of second failed EIS, yours will fail too, turning you into the dealer's personal human cash machine)
1988 F150 144,000 miles (leaks all the colors of the rainbow)
Previous stars: 1981 Brava 210,000 miles, 1978 128 150,000 miles, 1977 B200 Van 175,000 miles, 1972 Vega (great, if rusty, car), 1972 Celica, 1986.5 Supra