Revving up and down

[bluewar02]

Hello all I'm hoping somebody can help I have an 03 f-150 xlt 4.2 after 5 min of a cold start the engine starts revving up and down a lot after it warms up sometimes it's fine and sometimes it's not and it's getting worse, the only codes coming up are for the 02 sensors I do not have cats on my truck I do have the sensors hooked up and tie wrapped under the truck I did change a lot of parts already all new parts, fuel filter, spark plugs and wires, new coil, oil change, new IAC, new TPS, cleaned the mass air flow sensor, took off and cleaned the throttle body, cleaned the EGR valve, checked the PCV valve it does rattle, I do not see or hear a vac leak I used card cleaner and sprayed all the vac lines and nothing I checked the PCV elbow that seems fine I'm not sure what else to do please help I changed the motor about a year ago it has about 40k on it image-849709597.jpg

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