Weird whining noise?

[kk2002s]

I Third Secondary Air Pump
If you are familiar with it, Cold starts it will run around 90 seconds, then turn off. Usually doesn't come on if you turn car off and restart or if engine is warm.

If you are hearing on top of the pump itself, a very high pitch wine, then it is the sealed bearing inside the pump (It's another IMSB - Ohh know!!)
It can be fixed by opening up pump, pulling out bearing and shooting grease into it.
Mine has been quite for a couple years now.

[coolbreeze551]

Mine did the exact same thing a year or two ago. Sounded like a high pitched vacuum cleaner behind me. Since then it has stopped and throws CEL about every 1-2 weeks for the SAI. I think I am just going to have it flashed ROW so I don't have to keep clearing codes, uneven idle at cold start or a $3000+ repair bill.