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YOUR RESEARCHMy first Boxster, my first problem - 986 Forum - The Community for Porsche Boxster & Cayman Owners
Reported or suspected cause
vacuum hoses
Reported cause
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Reported cause
when i had a strange hissing noise i found it was the vacuum hose that connects to the brake booster.
My first Boxster, my first problem - 986 Forum - The Community for Porsche Boxster & Cayman Owners
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Leading evidence: 'vacuum hoses' (1 discussions report identifying this cause; no attributable repair resolution). Across 1 matching discussions, the most frequently mentioned possible cause is 'vacuum hoses' (1 discussions; 1 report identifying it and 0 suggest it). The most frequently discussed action is 'Clean mass air flow sensor' (1 discussions). For that action, 0 discussions report a resolution and 0 report an unsuccessful attempt. No action has an explicit, attributable resolution report under the current rules. These are forum reports and suggestions, not a confirmed diagnosis.
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Suggestion
I would probably try cleaning the MAF and then reset codes if present.
My first Boxster, my first problem - 986 Forum - The Community for Porsche Boxster & Cayman Owners
Reset codes if present
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Suggestion
I would probably try cleaning the MAF and then reset codes if present.
My first Boxster, my first problem - 986 Forum - The Community for Porsche Boxster & Cayman Owners
Run better
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Suggestion · Original poster
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.
My first Boxster, my first problem - 986 Forum - The Community for Porsche Boxster & Cayman Owners
Run better
No successful repair reported for this finding.
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Suggestion · Original poster
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.
My first Boxster, my first problem - 986 Forum - The Community for Porsche Boxster & Cayman Owners
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7 eligible posts · 0 unverified posts · 1 discussions match the subject in their title or opening post.
986Forum: 1 discussions
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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
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.
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.
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.
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.
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
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