As said will not cause any probs other than those stated, it must have something that is mechanically preventing the throttle from closing fully to be still running.
You should try cleaning the iscv with carb cleaner, often works, a new one may not cure it, if it being told to be open that amount by the ecu, maybe a diff cts, but 1700 is way too high for efi even when cold.
tabetha