I've never even HEARD of this problem before...

[cooljess76]

Do the new lights and signals function properly? If not, I'd recheck the wiring as well as the fuses. I don't think it would cause the problems described, but who knows. Did you mess with anything else while under the hood(check oil, air filter, coolant etc)? I ask this because you may have a cracked intake boot or perhaps you might have not securely fastened the oil cap. These things would cause it to run really rough.

[Entropyman]

One thing to consider is that the wiring for the coolant sensor is in the same general area that you were working when changing the headlight. My cooling fan also comes on at high speed whenever the key is turned on. The switch wiring was rigged and a ground wire was spliced into the the coolant sensor harness and grounded to the car body (previous owner). My advice is to look around and see if any wires have been broken or diconnected.

[poohlikeshunny]

cooljess, I'll have to double check to make sure i didn't knock anything loose. But I did not touch anything else except the headlights, wires, and the black cover you need to remove to get to them. I felt some minor air around the intake boot though, notvsure if it was a leak or something else that was running properly...

Entropyman, I was thinking about it today and unless it is a coincidental problem that ocurred elsewhere at the EXACT time I was removing the headlights, it must be a wiring issue. I notice a few wires that came loose and/or apart, but not sure what is safe to connect and what is not...hopefully that's the whole problem...but the idling still worries me...

BTW, thank you so much everyone for your input. I haven't had this much help in many forums. THANKS!!!

[oakley]

The SAP is that the cylinder with the bright blue hose that comes out of the top and is situated near to the airbox??
Also the buzz maybe linked to this bit?
http://jackassofalltrades.com/ticker.html
Wont effect the idle and start up its just a noise reduction measure...

[poohlikeshunny]

now that I've read that link, some of the clicking is suddenly starting to make sense...awesome find!!!

although I do not have a blue hose anywhere in my 318ic...different color perhaps?

[M4YTY]

coolant temp sensors cause all sorts of wierd stuff to happen. Worth rechecking ur wiring to it.

[M-technik-3]

Rivets popped...drilled em out today. Fixed it already very simple noise gone.