Engine misfire problems on 1999 Honda Accord

I have codes p1164 and p1259 ,the motor has misfires on cylinders 1 and 4,i have chaanged the plugs, wires,and distributor cap and rotor,I also swaped the injectors around and the same cylinders have misfires,I checked the compression and all four cylinders are good.Does anyone know what could cause this?

by in Costa Mesa, CA on April 30, 2013
2 answers 4 comments
ANSWER by , April 30, 2013
P1164 is a code for problem with the air/fuel ratio sensor performance. P1259 is a problem with the VTEC oil pressure switch circuit or oil pressure valve circuit. P1164 , at this point could be the sensor , but could also be the PCM. P1259 could be from running low on oil or clogged V-TEC screen. ALSO could be electrical or other internal mechanical problem. .......Are you ALSO getting P0301 and P0304? Does the P1259 clear with scanner and stay off until you try to rev over 4000RPM (when V-TEC kicks in)?
COMMENT by , April 30, 2013
Thanks very much,I will check those things
ANSWER by , April 30, 2013
COULD ALSO BE LACK OF MAINT AND THE VTEC CAM POSITION SENSOR SCREENS COULD BE PLUGGED WITH DEBRI
COMMENT by , April 30, 2013
Thanks, do you know where the vtec sileniod,and the cam sensor screens are?
COMMENT by , April 30, 2013
ON VALVE COVER BY TIMING GEAR ARE THE SOLENOIDS, BUT TO CK SCREENS YOU MUST PULL VALVE COVERS. I DON'T REC YOU TRY THIS UNLESS U HAVE DONE IT B4
COMMENT by , April 30, 2013
thanks