89 prelude si 2.0

heres the problem my car pulses 150 to 200 rpm at idle Ive replaced dis.cap plugs wires roter electronic idle air control valve, fast idle valve checked vaccume leeks(none) checked injectors read 2.8 ohms fuel filter is new fuel pressure is good cyl 1,3,4 are running rich and 2cyl is lean it reads 10+ on the hydrocarbons. I can turn the idle screw in all the way on the throltle body and the pulsing stops until i turn the AC on then it starts again. cooling fluid is good and bled.
Please Help

also the check engin light comes on the codes on the ecu read o2 (1) & o2 (2) both sensors are new and good. timing is also right on.

Ive been told it could be the fuel injectors or a valve adjustment. Any ideas at all??????

Have you tried to adjust the A/C idle control valve? Do you have a haynes manual? If so its on page 4-7 picture ill. 11.1. If not give me your email and I will send you the page.

I would imaging fuel injector on the #2 port....Maybe an intermediate resistor problem....
Other than that, this is beyond my scope and Id have to be there to be any more help...
Good Luck dude

Also, if you havent done so already, reset your ECU by taking the "clock" fuse out or any other way you prefer...Then after you reset it, let the engine idle for about 15 minutes without pressing the gas to allow the ECU to relearn itself and hopefully help your idle problem out....
This is what I did and it totally fixed my idle/stalling problem.

Ive reset the computer by both fuse and batt. cable