Hi! Thanks for taking the time to stop by my post!

first off the problems. Car is a 1999 Civic LX 4Dr it has a D16Y7 (completely stock) with a intake swap to the Y8 intake, car runs completely fine normally, but randomly will get a check engine light with a P0505 code and the car will start getting a high idle with idle surge and stuttering on acceleration. Unsure of what is causing the problem. Any help is greatly appreciated!