b16/b18c/ctr wont idle properly

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ok i have a :
1991 da integra
stock jdm b16a head
jdm gsr block, and crank, bored 81.50 with 81.50 ctr pistons
315 dsm injectors
p28 chipped ecu

problem is when i start the car(this is on a cold start) it goes to 1300rpms then 10-20 seconds later it drops to fluctuating 650-800rpms. as it sits there and warms up it fluctuates a little more 500-800, so it's seems to have a harder time idling properly as it warms up. i have been stuck on this for almost 2 months now, so any and all help will be appreciated

 

what ECU are you using? did you check your TPS sensor? How does it drive? Maybe you have a vaccum leak?

 

You need to get your car tuned. Your cr is pretty high.

 

I agree i need a tune. I just want it to run proerly so it can be tuned.