High pitched sound before starting up

[Jager]

The high pitch noise (whining) most likely is the Secondary Air Pump.

For your bouncing idle try cleaning your throttle body. There are multiple threads on this site that will help you on how to do this, you will have to remove it to clean it properly.

[nicecar]

for me the boucing idle was maf, shortly after aos replacement, sometimes recent install of after market air breather cloggs maf as well, once again, not an expert by any means just recently been thru same symptoms. whinning is secondary air pump

[impboy]

I decided to clean the throttle body using both Pedro's Garage and Wayne Dempsey's book as references. It only took about 2 hours to do the whole project and that's because I was going slow and had a hellva time getting the lower rubber sleeve back on.

I cleaned the MAF while I was at since it's a 3 minute job once you're in there.

I took the car out to test drive it and got it up to running temp and it ran like a dream. No weird idle fluctuations. I still hear that tiny alarm sound and the other strange clicking/whirring sound but the car is running great now. If I trip a CEL (assuming it's related to the secondary air pump), I'll go after that next.

Sidenote--> The throttle body wasn't as dirty as I thought it was going to be but cleaning that sucker up made a big difference. I used CNC MAF cleaner since that's all I had at the time, but it did a great job. It looks like new on the inside now!:dance:

Thanks for the help!