Go Back   986 Forum - for Porsche Boxster & Cayman Owners > Porsche Boxster & Cayman Forums > Performance and Technical chat

Reply
 
LinkBack Thread Tools Display Modes
Old 03-20-2020, 07:20 PM   #21
Registered User
 
Join Date: Aug 2017
Location: Tucson,az
Posts: 457
well same problems persist,..so I ordered a new MAF sensor...installed the new AOS,. Runs a bit better but still hisses so I will now pull the alternator so I can look for vacuum leaks,.but if I disconnect battery don't I loose ALL the stored info..like over rev's Etc..I have never been able to research the engine that way and I sure would hate to lose that data,.?? Thanks frank

flmont is offline   Reply With Quote
Old 04-13-2020, 08:28 PM   #22
Registered User
 
Join Date: Aug 2017
Location: Tucson,az
Posts: 457
well still no cure on my 2.7,...I did pull Passenger side intake runner and Alt. to get to the Vacuum parts, replaced the canister, all new line,and fittings also the one way valve to resonance flap, had injector's tested they are fine, new oil tube to engine replaced,new MAF sensor, and of course intake seals,..and it still has a vacuum leak some where you can hear it sucking air, So I disconnected the AOS to intake tube and plugged it.So at idle there's no more hissing. But when I rev it up a bit it starts sucking in air from some where, could the little bellows on the bottom of the AOS cause such a loud sucking sound if its not 100% sealed .My smoke test didn't reveal any major leaks I could see,..But I didn't look underneath the car at that time either.?? Going to the shop soon if I don't find the source of that sucking sound..Thanks Frank
flmont is offline   Reply With Quote
Old 04-14-2020, 05:20 AM   #23
1998 Boxster Silver/Red
 
Join Date: Sep 2017
Location: 92262
Posts: 2,219
Quote:
Originally Posted by flmont View Post
well still no cure on my 2.7,...I did pull Passenger side intake runner and Alt. to get to the Vacuum parts, replaced the canister, all new line,and fittings also the one way valve to resonance flap, had injector's tested they are fine, new oil tube to engine replaced,new MAF sensor, and of course intake seals,..and it still has a vacuum leak some where you can hear it sucking air, So I disconnected the AOS to intake tube and plugged it.So at idle there's no more hissing. But when I rev it up a bit it starts sucking in air from some where, could the little bellows on the bottom of the AOS cause such a loud sucking sound if its not 100% sealed .My smoke test didn't reveal any major leaks I could see,..But I didn't look underneath the car at that time either.?? Going to the shop soon if I don't find the source of that sucking sound..Thanks Frank
When you replaced your AOS (however many times)... did you replace the bellows at the bottom of the AOS? What kind of clamp did you use?
__________________
1998 Porsche Boxster
1986 BMW 325es
2012 Ford Edge Sport
Starter986 is offline   Reply With Quote
Old 04-14-2020, 03:16 PM   #24
Registered User
 
Join Date: Aug 2017
Location: Tucson,az
Posts: 457
Hey Starter,..yes ( replaced twice) and I used a new bellows each time but with a worm clamp ,.I will double check that clamp tho..Thanks
flmont is offline   Reply With Quote
Old 04-15-2020, 04:55 PM   #25
Registered User
 
Join Date: Aug 2017
Location: Tucson,az
Posts: 457
So far the shop blames it on those little furry bastards (field mice or pack rats)

flmont 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 05:26 AM.


Powered by vBulletin® Version 3.8.7
Copyright ©2000 - 2021, 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