Ok so when I first start my car anytime of the day if the engine has cooled down I have to hold the throttle down a little bit so it will stay running until it hits normal temp I can let go of the throttle but then it idled at like 1500 rpm and kinda bouncing up and down like it cammed but it's not, and I just had put a head gasket in it and it never did this before I did, anyone know what it could be? Also my first Honda I've owned so don't know to much other the. It's easy to replace the head gasket. But please let me know what y'all think it is.