Notices
928 Forum 1978-1995
Sponsored by:
Sponsored by: 928 Specialists

Missing a Plug! Maybe?

Thread Tools
 
Search this Thread
 
Old 01-24-2017, 07:27 PM
  #16  
Kiwi'79
Pro
 
Kiwi'79's Avatar
 
Join Date: Mar 2016
Location: Cromwell, Central Otago NZ
Posts: 585
Received 2 Likes on 2 Posts
Default

Originally Posted by linderpat
Take a picture of the passenger front wheel well and post it up, having it show all of the plumbing in there. As to the cap in the airbox, any plastic type plug of the right diameter will work - grab a black one at the local hardware store. Right now, this is a vacuum leak.
Sorry Mikebte for slight thread hijack,

ED, I need educating here (no pun intended...), how can it be a vacuum leak at the airbox, when there are two whooping great intake holes up the front, surely the air filter cannot be that presise to "meter" airflow?

Reason I ask is my airbox rubber straps are so loose and worn as to not be really effective in clamping down the airbox lid.
Old 01-24-2017, 08:43 PM
  #17  
Mikebte
Pro
Thread Starter
 
Mikebte's Avatar
 
Join Date: Dec 2016
Location: Tucson, AZ
Posts: 501
Likes: 0
Received 1 Like on 1 Post
Default

Originally Posted by Kiwi'79
Sorry Mikebte for slight thread hijack,

ED, I need educating here (no pun intended...), how can it be a vacuum leak at the airbox, when there are two whooping great intake holes up the front, surely the air filter cannot be that presise to "meter" airflow?

Reason I ask is my airbox rubber straps are so loose and worn as to not be really effective in clamping down the airbox lid.
Not to worry, I understood what was being said.
In this case, it is a Vacuum port. Being as it draws a vacuum on the Carbon Canister if all hoses are in place.
Since what I assume was a hose is missing, it is just drawing in dirty air.
Once I replace this missing hose, air running over the mystery hole will now be pulling a vacuum.

This missing hose may explain the smell of gas I get in the garage.
Old 01-24-2017, 09:58 PM
  #18  
Kiwi'79
Pro
 
Kiwi'79's Avatar
 
Join Date: Mar 2016
Location: Cromwell, Central Otago NZ
Posts: 585
Received 2 Likes on 2 Posts
Default

Originally Posted by Mikebte
Not to worry, I understood what was being said.
In this case, it is a Vacuum port. Being as it draws a vacuum on the Carbon Canister if all hoses are in place.
Since what I assume was a hose is missing, it is just drawing in dirty air.
Once I replace this missing hose, air running over the mystery hole will now be pulling a vacuum.

This missing hose may explain the smell of gas I get in the garage.
Ah!!! Thankyou.
Old 01-24-2017, 11:27 PM
  #19  
The Forgotten On
Rennlist Member
 
The Forgotten On's Avatar
 
Join Date: May 2012
Location: Thousand Oaks California
Posts: 4,964
Received 316 Likes on 263 Posts
Default

It's a metered vacuum leak as it is before the afm but it still means unfiltered air is getting into the engine.
Old 01-25-2017, 06:20 AM
  #20  
Kiwi'79
Pro
 
Kiwi'79's Avatar
 
Join Date: Mar 2016
Location: Cromwell, Central Otago NZ
Posts: 585
Received 2 Likes on 2 Posts
Default

Sorry guys, serious "duh" moment for me!!! Read the whole thing properly as I should have from the start, I feel unEDucated...
Old 01-28-2017, 12:12 AM
  #21  
STRIKEMASTER
Drifting
 
STRIKEMASTER's Avatar
 
Join Date: Jun 2012
Location: MAPLE SHADE, N.J.
Posts: 2,465
Received 38 Likes on 23 Posts
Default

I have an '83 euro K-Jet. The part you have circled goes over a port on mine that is not drilled thru. The port on the other(driver's ) side is supposed to have an 'anti-backfire' cap that is closed under vacuum, but vents under pressure. I have that capped off. Mine doesn't have any EPA stuff on it so it might not apply to yours.
Old 01-28-2017, 12:31 PM
  #22  
Mikebte
Pro
Thread Starter
 
Mikebte's Avatar
 
Join Date: Dec 2016
Location: Tucson, AZ
Posts: 501
Likes: 0
Received 1 Like on 1 Post
Default

Took a copy of the vacuum under the hood. Ordered a lot of vacuum hose, I'm sure it won't be enough.
I'm gonna dive in this morning and replace all hoses.
I have 12ft of 3mm, 7ft of 6mm, and 3ft of 10mm hose. I'm sure I'll still have to make a trip to the overpriced parts store for hose.

Old 01-28-2017, 03:40 PM
  #23  
Mikebte
Pro
Thread Starter
 
Mikebte's Avatar
 
Join Date: Dec 2016
Location: Tucson, AZ
Posts: 501
Likes: 0
Received 1 Like on 1 Post
Default

Replaced all vacuum hose except the carbon canister.
I ran out of large vacuum line. More on order.
I also found the brake fluid cap and other issues to repair. Best advise I would give myself if I did this again would be to buy all the intake gaskets, hoses and rebuild the intake while replacing hoses.

Not really sure how it was running so well.



























Old 01-28-2017, 04:43 PM
  #24  
Mikebte
Pro
Thread Starter
 
Mikebte's Avatar
 
Join Date: Dec 2016
Location: Tucson, AZ
Posts: 501
Likes: 0
Received 1 Like on 1 Post
Default

Okey, here it is. The hose that should be on the air cleaner is bent down and hooked to the mystery hose.
I followed the mystery hose, it has been zip tied all the way to the rear of the car ending above the differential.




Old 01-28-2017, 07:29 PM
  #25  
Mikebte
Pro
Thread Starter
 
Mikebte's Avatar
 
Join Date: Dec 2016
Location: Tucson, AZ
Posts: 501
Likes: 0
Received 1 Like on 1 Post
Default

Hose removed, time to focus on tank vent system.

Zip ties are a good sign of it not being porsche OEM.




Quick Reply: Missing a Plug! Maybe?



All times are GMT -3. The time now is 07:35 AM.