08-07-2020, 02:27 PM
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#21
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Registered User
Join Date: Jul 2010
Location: California
Posts: 1,859
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Quote:
Originally Posted by Starter986
Is that right? Never heard of it... never seen it. From where? I replaced my AOS a couple years ago... Pelican... and it came with no hose (the updated hose). I had to purchase that separately... another ~$35.
Link? Proof? Thanks.
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They used to... The AOS came with the accordion shaped hose.
I have not replaced an AOS in the last 4 years so things must have changes. Does not surprise me, the parts suppliers look for more ways to gouge us.
__________________
Jäger
300K Mile Club
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08-07-2020, 02:39 PM
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#22
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Registered User
Join Date: Jul 2010
Location: California
Posts: 1,859
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Quote:
Originally Posted by Starter986
Is that right? Never heard of it... never seen it. From where? I replaced my AOS a couple years ago... Pelican... and it came with no hose (the updated hose). I had to purchase that separately... another ~$35.
Link? Proof? Thanks.
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Shows the hose in the photo:
https://www.pelicanparts.com/More_Info/99610702304M100.htm?pn=996-107-023-04-M100&bt=Y&fs=0&SVSVSI=1048
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Jäger
300K Mile Club
Last edited by Jager; 08-07-2020 at 02:42 PM.
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08-07-2020, 02:52 PM
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#23
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1998 Boxster Silver/Red
Join Date: Sep 2017
Location: 92262
Posts: 2,961
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Quote:
Originally Posted by Jager
They used to... The AOS came with the accordion shaped hose.
I have not replaced an AOS in the last 4 years so things must have changes. Does not surprise me, the parts suppliers look for more ways to gouge us.
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I see my confusion. I thought you were referring to the hose/tube that connects the top of the AOS to the intake... and I was wondering what you meant by "included". Then I saw your post and realized you were talking about that hose at the bottom of the AOS... yes, the accordian. That and the clamp seperately I purchased. Fromn Pelican.
That top tube I had to replace because the AOS had been redesigned since the original. That tube cost me ~$35. I had a fix in place (the original tube with a section cut out and a piece of hose clamping the two pieces together). My OCD took over and I couldn't stand that ugly part snaking across the top of the motor.
__________________
1998 Porsche Boxster
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08-07-2020, 04:55 PM
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#24
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Registered User
Join Date: Jul 2020
Location: Durham, NC, US
Posts: 18
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Quote:
Originally Posted by Jager
What does your local specialize in??
The diaphragm inside the AOS is cracked.
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They specialize in volkswagen. Here's the pictures of the leaking hose they said. I am confused that these hoses are before the MAF. The air should be adjusted. Thanks for any help!
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08-08-2020, 03:34 PM
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#25
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Registered User
Join Date: Jul 2010
Location: California
Posts: 1,859
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Tim, You might have other vacuum leaks besides the AOS. If your mechanic did a smoke test he might have found a cracked hose(s). BUT, if you have major suction at the oil fill tube the AOS is bad.
__________________
Jäger
300K Mile Club
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08-08-2020, 04:40 PM
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#26
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Registered User
Join Date: Jul 2020
Location: Durham, NC, US
Posts: 18
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Quote:
Originally Posted by Jager
Tim, You might have other vacuum leaks besides the AOS. If your mechanic did a smoke test he might have found a cracked hose(s). BUT, if you have major suction at the oil fill tube the AOS is bad.
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Yeah. I did see a lot of signs of AOS failure. Like, the car runs rough at idle only when it starts from cold.
I am just curious that does the fault code relates to the failed AOS or the leaking hose.
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08-11-2020, 05:54 PM
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#27
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Registered User
Join Date: Jul 2010
Location: California
Posts: 1,859
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Quote:
Originally Posted by timqqt
Yeah. I did see a lot of signs of AOS failure. Like, the car runs rough at idle only when it starts from cold.
I am just curious that does the fault code relates to the failed AOS or the leaking hose.
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Yes, a bad AOS will trigger those fault codes. I have seen it a few times.
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Jäger
300K Mile Club
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08-12-2020, 11:13 AM
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#28
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Registered User
Join Date: Jul 2020
Location: Durham, NC, US
Posts: 18
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Quote:
Originally Posted by Jager
Yes, a bad AOS will trigger those fault codes. I have seen it a few times.
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Thanks. I am gonna work on those. I just replaced the engine air filter. Some oil residual on it. Another sign of failed AOS?
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08-12-2020, 06:35 PM
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#29
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Registered User
Join Date: Jul 2010
Location: California
Posts: 1,859
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Quote:
Originally Posted by timqqt
Thanks. I am gonna work on those. I just replaced the engine air filter. Some oil residual on it. Another sign of failed AOS?
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You shouldn't be seeing oil on the air filter unless it was a K&N reusable filter, Tacky Oil is used on those. I can't imagine someone spraying tacky oil on a paper filter... but???
A bad AOS will cause oil in the intake cross-over tubes. One of the signs of a bad AOS is smoke at start-up... Have you experienced that?
__________________
Jäger
300K Mile Club
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08-12-2020, 07:55 PM
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#30
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Who's askin'?
Join Date: Mar 2018
Location: Utah
Posts: 2,446
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Quote:
Originally Posted by timqqt
Thanks. I am gonna work on those. I just replaced the engine air filter. Some oil residual on it. Another sign of failed AOS?
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Tim, you're getting good help here from Jager, so I hesitate to interrupt.
However:
I have seen oil (in small amounts) get to the air filter due to a bad aos, when combined with a poorly running engine.
Under normal conditions air only moves in one direction through the intake tube. However: if your engine "backfires", even just a slight stutter or a cough, then yes, you can see air moving the other direction, though only momentarily. I wouldn't worry about it at all, for the moment, as you could end up chasing squirrels that aren't there. I would focus first on your AOS, then on your vacuum leaks.
Then let us know how it goes.
Sent from my SM-G970U using Tapatalk
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08-14-2020, 06:13 AM
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#31
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Registered User
Join Date: Jul 2010
Location: California
Posts: 1,859
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Quote:
Originally Posted by maytag
Tim, you're getting good help here from Jager, so I hesitate to interrupt.
However:
I have seen oil (in small amounts) get to the air filter due to a bad aos, when combined with a poorly running engine.
Under normal conditions air only moves in one direction through the intake tube. However: if your engine "backfires", even just a slight stutter or a cough, then yes, you can see air moving the other direction, though only momentarily. I wouldn't worry about it at all, for the moment, as you could end up chasing squirrels that aren't there. I would focus first on your AOS, then on your vacuum leaks.
Then let us know how it goes.
Sent from my SM-G970U using Tapatalk
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No doubt backfires would throw oil onto the air filter if you had oil in the intake/throttle body. I have not seen that since I have never had a Porsche motor backfire.
So Tim, has your motor backfired??
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Jäger
300K Mile Club
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08-17-2020, 06:01 PM
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#32
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Registered User
Join Date: Jul 2020
Location: Durham, NC, US
Posts: 18
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Quote:
Originally Posted by Jager
No doubt backfires would throw oil onto the air filter if you had oil in the intake/throttle body. I have not seen that since I have never had a Porsche motor backfire.
So Tim, has your motor backfired??
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I think I never experienced that. But you are right, I used K&N air filter!
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08-18-2020, 07:04 AM
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#33
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Registered User
Join Date: Aug 2018
Location: Woodland Wa
Posts: 1,294
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Quote:
Originally Posted by timqqt
They specialize in volkswagen. Here's the pictures of the leaking hose they said. I am confused that these hoses are before the MAF. The air should be adjusted. Thanks for any help!
![](http://986forum.com/forums/uploads02/hose21596848133.jpg)
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There are no hoses that enter the intake before the MAF sensor.
If there is a vacuum leak in the hoses that you are pointing to, then that air is not adjusted.
The vacuum leak in those hoses is part of your problem.
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