jmc88runner

Heres the story in a nut shell, did a auto to man on a 88 3vze 4runner, after the swap stuff started acting up, Ive replaced the plugs, cap and rotor, wires, knock and knock pigtail, tps, mass airflow, 02 sensor, egr vacuum modulator, cleaned the IAC, Coolant sensor and cleaned cold start injector. It idles back and forth between 1100-600 rpm and almost dies out and I have a 25 lean code. I checked for vacuum leaks and the only time it responds it when I spray carb cleaner around the air cleaner box. I cleaned the throttle body and the intake really well when I did the knock. I was thinking it could possible be the fuel pressure regulator but I dont know. Any suggestions will help out. If anyone can figure it out its you guys. Thanks