Well, as some of you may or may not know, I got my lsvtec tuned about 5000 miles ago. So far I am very impressed and I am proud that I finally got the car running.

I recently took out the 440cc injectors and put in the stock obd2 injectors to pass emissions with my old obd2 ecu.

After plugging in my 440's again, I have noticed that the idle when cold will be at 1500 for a minute or two then try to drop back down as the engine warms up. The problem lies here:
-when the engine tries to drop below 1500 rpms it stutters and goes right back up to 1500 rpms.

-when the engine is at operating temperature, there is no problem what so ever.

I am thinking that it could be a tune issue but I dont know for sure. I am tuned with Hondata s200 by Motorvations.

Any suggestions?