That was a good question, I was cleaning my throttle body a couple of weeks ago and was wondering the same thing. If you haven't cleaned your throttle body, it's a good idea to do so. Keeps the idle constant and the engine operating efficently.
Tom, can you post a pics or a quick set of DIY steps for doing the throttle body cleaning on the 986 correctly?
I don't have step by step instructions but here's what I have.
The way I removed it was to first remove the air duct then, you'll need long handled torx wrenches (star sheped) to remove the four bolts throught the throttle body.
The hardest part was getting the air duct back onto the throttle body. I've had mine off two times. The first time I used grease to help slide the body back on but was cautioned by Loren not to use grease in this area since it attracts dirt and grime. The second time I used a heat gun to expand the end of the duct so it would go over the intake to the throttle body. Others have told me it just snaps in. The end that connects to the air box does but the other end is a bear. Good luck.
I have a recently acquired 2002 base model boxster; about to replace AOS due to severe smoking after 1st oil change w 0w-40 Mobil one. Anybody think this oil could have brought on the smoking? And in terms of removing throttle body for cleaning, could I loosen the hose clamps on the big hose leading to the intake manifold and rotate the whole assembly upwards to get better access to the TB screws? (Already got the hose to the air filter box loose.) They seem very awkward to get at in normal position...