Interesting idle question.

[AntiZeroTrip]

OK I have noticed this recently while letting my car warm up after starting it. My car starts and idles fine, maybee a tiny idle surge, nothing dramatic then after like 4 or 5 minutes the idle will suddenly drop to just above 500 rpms, But it wont die. Then about 3 seconds after that, it goes right back to normal. can anyone explain this?

 

[95blackGsTurbo]

Check your ISC motor and your FIAV to make sure they are working properly. Also make sure your BISS screw is adjusted properly. Lots of abbr. in that post .