Idle issues
I just bought a 2000 Sentra SE with an SR20DE engine that has 123,000 miles. It idles fine at a cold start but when the idle settles at around 800 rpms it will occasionally drop to around 500 rpms and feel like its going to shut off but it doesnt. I looked all over the internet and it seems to be a common problem but no one had any real answers. I want to fix this before I start any kind of tuning. Ideas anyone?