Go Back   986 Forum - for Porsche Boxster & Cayman Owners > Porsche Boxster & Cayman Forums > Boxster General Discussions

Reply
 
LinkBack Thread Tools Display Modes
Old 04-01-2014, 12:32 PM   #1
Registered User
 
Join Date: Apr 2014
Location: Denmark
Posts: 3
My first Boxster, my first problem

Hi guys. I just bought my first Porsche Boxster in Germany 6 month ago. Its a beautiful 986, 2.5 with only 60.000 km on the clock and a full service history. It is as new

But there is this thing. Im not 100% sure what the problem is, but I think it might be an air leak??? When it has been sitting for at day or two and I start it up, it really runs bad until it gets to normal temp. Sometimes it even stalls. It sputters and misfires until it gets warm. But as soon at it gets warm its OK. Its not perfect, but acceptable. The rpm gage is not 100% steady, but again acceptable. The when I turn the car off, it makes this noise as you can hear. I think it sounds like and air leak, which would also explain, that the craked hose would expand when the car gets warm cover up the crack and make it run better. I dont know, but what do you guys think?

Thanks for the help.

https://www.youtube.com/watch?v=4_cxYT5SvKY&feature=youtu.be

Stender is offline   Reply With Quote
Old 04-01-2014, 03:52 PM   #2
Beginner
 
Jamesp's Avatar
 
Join Date: Mar 2013
Location: Houston
Posts: 1,659
Garage
Is your Check Engine Light (CEL) on with the key on, and car off? Is the CEL on when the car is running?
__________________
2003 S manual
Jamesp is offline   Reply With Quote
Old 04-01-2014, 09:07 PM   #3
Registered User
 
Join Date: Apr 2014
Location: Denmark
Posts: 3
Hi James

The CEL is on together with all the other lamps just before I start the car, as on any other car. But as soon as its turned on, the CEL goes away.

Last edited by Stender; 04-01-2014 at 09:09 PM.
Stender is offline   Reply With Quote
Old 04-02-2014, 06:09 AM   #4
Registered User
 
jb92563's Avatar
 
Join Date: Apr 2012
Location: Riverside, CA
Posts: 1,664
Do some reading about the AOS (air/oil Seperator) as it seems to produce all manner of bad behavior when it goes bad and seems to be very common.

Vacuum leaks are quite possible as well and when related to the AOS is another place to check.
__________________
"It broke because it wants to be Upgraded "
2012 Porsche Performance Driving School - SanDiego region
2001 Boxster S, Top Speed muffler, (Fred's) Mini Morimotto Projectors, Tarret UDP,
Short Shifter, Touch Screen Dual Din Radio, 03 4 Bow glass Top (DD & Auto-X since May 17,2012)
jb92563 is offline   Reply With Quote
Old 04-02-2014, 06:18 AM   #5
Registered User
 
Join Date: Oct 2012
Location: Boulder, Co
Posts: 69
Garage
I would probably try cleaning the MAF and then reset codes if present. I think that if you undo the battery the MAF will reset and 'relearn' baseline setting. No mechanic but it sounds like the computer is having trouble getting the cold air mix correct.
__________________
'01 Boxster S - Silver/Gray
'58 356A Cab - Fjord Green/tan
Parrot356 is offline   Reply With Quote
Old 04-02-2014, 08:01 AM   #6
Registered User
 
Join Date: Apr 2014
Location: Denmark
Posts: 3
OK guys, thanks very much for the answers. I will try to do that. But have you listened to the youtube clip I put up? There is some kind hissing/scchhhhh noise when the engine shuts offl? I have never owned a Porsche before, but it seems kind of strange.
Stender is offline   Reply With Quote
Old 04-02-2014, 08:30 AM   #7
Registered User
 
mikesz's Avatar
 
Join Date: Feb 2013
Location: Cranston RI
Posts: 853
Garage
when i had a strange hissing noise i found it was the vacuum hose that connects to the brake booster. Once i popped it back in it was fine. Its in the front trunk lower right had side of the brake booster. I have a 99
__________________
99 Porsche Boxster
mikesz is offline   Reply With Quote
Reply


Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is On
Trackbacks are On
Pingbacks are On
Refbacks are On




All times are GMT -8. The time now is 06:23 AM.


Powered by vBulletin® Version 3.8.7
Copyright ©2000 - 2019, vBulletin Solutions, Inc.
Content Relevant URLs by vBSEO 3.6.0
Copyright 2018 Pelican Parts, LLC - Posts may be archived for display on the Pelican Parts Website -    DMCA Registered Agent Contact Page