need help tried everything

[92egmonkeyb]

alright so here it is when car is cold it runs just fine holds idle and drives good but then when it warms up my idle drops so low it feels like it is going to stall then it will kick it self back up after like 40 sec or so and then it will hold an idle but it's kind of rough i've replaced everything. the motor is a d16y5 i have it running off of a p28 chipped. i have changed everything except the iacv i just cleaned that and replaced the o-ring. i dont know what else to do i just want it to idle normal everything else is cool what would cause the idle to drop only when the car is warm? Any help is greatly appreciated
thanks

[SOHC_STUDENT]

a faulty 02 sensor can cause the engine to bog at idle

[xl cubert lx]

any CEL? any mods to the car other than the chipped p28?

[92egmonkeyb]

well i guess i figured out my problem i advanced my timing to 18btdc because that is what my basemap is set at and i went and changed my fuel filter and filled up with 91 octane and now it is running like a champ i guess no more 87 for me oh well but yea it is pulling hard now