Smoke
Thread Starter
Intermediate
Joined: Aug 2012
Posts: 26
Likes: 0
From: Dallas, TX
Smoke
A few months ago during the summer during start up after sitting all night a puff of white smoke came out of the tailpipes, lasted about 2 seconds. Thick smoke I thought WTF. Never happened again until yesterday. I was coming off a clover leaf and clear ahead of traffic so I accelarated prob around 5k on the tach I got a big puff of smoke. I mean thick smoke. Came out of the throttle and pushed in the clutch and slowed and slowly released the clutch and a little more smoke not much then nothing again until start up this morning. It runs fine otherwise. All the gauges are normal. No leaks, drips smooth running engine even at idle. All mx up to date. 2002 911 with 63k on the odometer. Oil is right in the middle on the drip stick. I had a volkwagen vanigon do the same thing years back. Anybody have a clue?
Parts Specialist
Rennlist Member
Rennlist Member
Joined: Aug 2008
Posts: 16,326
Likes: 29
+1
over fill or AOS sucked a tad
see it on the track fairly regularly - brief plumes of smoke - then nothing
We think the cars have Indian heritage that requires periodic smoke signals to the motherland
over fill or AOS sucked a tad
see it on the track fairly regularly - brief plumes of smoke - then nothing
We think the cars have Indian heritage that requires periodic smoke signals to the motherland
Drifting
Joined: Jan 2007
Posts: 2,242
Likes: 18
From: SoCal
do a quick check for "bad AOS": while car is running, remove the oil filler cap, then replace after a few seconds. If cap is hard to remove + car's idle gets rough while cap is off = most likely bad AOS.
Race Director
Joined: Sep 2007
Posts: 11,801
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From: Kittery, Maine
Nordschleife Master
Joined: Oct 2006
Posts: 7,446
Likes: 69
I had your symptoms, I was chasing.... I had put a brand new AOS, but it wasnt that. Chased it down to this... a crack in an O ring on the cam sensor... I believe it was pinched at the factory and finally gave way. Not likely its your prob, but just throwing it out here.
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Thread Starter
Intermediate
Joined: Aug 2012
Posts: 26
Likes: 0
From: Dallas, TX
OK. Did the test descibed above and sure enough, cap hard to get off and rough idle. BTW havent seen any smoke since the last time 3 weeks ago or so. Now just for the record. What is the AOS?
The only thing I can find in the shop manual is the Air and oil separator? And since I have someone attention. What is an Indy shop? My applogies in advance but my automotive background is classic mustangs 20 years followed by 3 years of Toyota/Lexus 2JZ-GTE. I've owned my 02 996 for 6 months and still learning the lingo. Thats for the responses!!
The only thing I can find in the shop manual is the Air and oil separator? And since I have someone attention. What is an Indy shop? My applogies in advance but my automotive background is classic mustangs 20 years followed by 3 years of Toyota/Lexus 2JZ-GTE. I've owned my 02 996 for 6 months and still learning the lingo. Thats for the responses!!
Drifting
Joined: Jan 2007
Posts: 2,242
Likes: 18
From: SoCal
WARNING: KK is a gearhead and knows his way around an engine 
OP, take a gander at this HOW-TO to give you an idea if you can DIY it:
http://www.renntech.org/forums/index...placement-aos/
OP, take a gander at this HOW-TO to give you an idea if you can DIY it:
http://www.renntech.org/forums/index...placement-aos/
Pro
Joined: Mar 2008
Posts: 710
Likes: 1
From: harrisburg pa
It seems like i may have the same issue. There is oil on the underside of some of the black throttle body air tubes and i had the big puffs of smoke yesterday.
It smoked for a little bit afterwards also.
I replaced the one on my boxster and i am sure this one will need it too.
I want to make sure that i am understanding this; there is only one aos in the car. For some reason i thought i saw something about two of them.
It smoked for a little bit afterwards also.
I replaced the one on my boxster and i am sure this one will need it too.
I want to make sure that i am understanding this; there is only one aos in the car. For some reason i thought i saw something about two of them.
