Notices
924/931/944/951/968 Forum Porsche 924, 924S, 931, 944, 944S, 944S2, 951, and 968 discussion, how-to guides, and technical help. (1976-1995)
Sponsored by:
Sponsored by:

More gas + No "PULL" =Bad BOV

Thread Tools
 
Search this Thread
 
Old 11-24-2006, 01:06 AM
  #1  
Speed Demon
Instructor
Thread Starter
 
Speed Demon's Avatar
 
Join Date: Aug 2005
Location: Plainfield, Illinois
Posts: 178
Likes: 0
Received 0 Likes on 0 Posts
Default More gas + No "PULL" =Bad BOV

Can a bad BOV cause a car not to boost at all???

I get no "pull" from the car...

i checked the BOV and it has a large rip....
Old 11-24-2006, 01:15 AM
  #2  
billthe3
Rennlist Member
 
billthe3's Avatar
 
Join Date: Aug 2006
Location: Boulder, CO
Posts: 5,693
Likes: 0
Received 3 Likes on 3 Posts
Default

Yes. If the valve is bad all boost will just imediately vent to the atmosphere, causing there to be no boost pressure.
Old 12-02-2006, 08:59 PM
  #3  
Speed Demon
Instructor
Thread Starter
 
Speed Demon's Avatar
 
Join Date: Aug 2005
Location: Plainfield, Illinois
Posts: 178
Likes: 0
Received 0 Likes on 0 Posts
Default

I got a new BOV from Paragon....

I upgraded to the billet finish one..

The engine idles and sounds better...

BUT...

I still don't get any boost....

I hear a boost leaking (hiss) but no pull...

i clamped the line btwn the wastegate and the cycling valve

I searched and the suggestion is "check the banjo bolt or J-boot"

What are they and most importantly WHERE are they?
Old 12-02-2006, 09:02 PM
  #4  
Mighty Shilling
Wax On, Wax Off
Rennlist Member
 
Mighty Shilling's Avatar
 
Join Date: May 2003
Location: 5280 ft above the sea
Posts: 17,727
Likes: 0
Received 4 Likes on 4 Posts
Default

J boot goes from Turbo to AFM. it's that rubber thing, that looks like a J.

Banjo bolt is on the hard line that goes around the top of the airbox. it's the bolt that bolts a vacuum line to that..
Old 12-02-2006, 09:03 PM
  #5  
Mighty Shilling
Wax On, Wax Off
Rennlist Member
 
Mighty Shilling's Avatar
 
Join Date: May 2003
Location: 5280 ft above the sea
Posts: 17,727
Likes: 0
Received 4 Likes on 4 Posts
Default

J-boot
Old 12-02-2006, 09:07 PM
  #6  
Speed Demon
Instructor
Thread Starter
 
Speed Demon's Avatar
 
Join Date: Aug 2005
Location: Plainfield, Illinois
Posts: 178
Likes: 0
Received 0 Likes on 0 Posts
Default

OHHH THAT thing...

and it is ussually the culprit to this kind of problem...ehhh

would it matter if the air filter box isn't closing right?
Old 12-02-2006, 09:09 PM
  #7  
Mighty Shilling
Wax On, Wax Off
Rennlist Member
 
Mighty Shilling's Avatar
 
Join Date: May 2003
Location: 5280 ft above the sea
Posts: 17,727
Likes: 0
Received 4 Likes on 4 Posts
Default

and an engine shot
Attached Images  
Old 12-02-2006, 09:10 PM
  #8  
Speed Demon
Instructor
Thread Starter
 
Speed Demon's Avatar
 
Join Date: Aug 2005
Location: Plainfield, Illinois
Posts: 178
Likes: 0
Received 0 Likes on 0 Posts
Default

THANKS GUYS IT HELPS A LOT...

I REALLY REALLY DO APPRECIATE THIS

Thanks
Old 12-02-2006, 09:13 PM
  #9  
Speed Demon
Instructor
Thread Starter
 
Speed Demon's Avatar
 
Join Date: Aug 2005
Location: Plainfield, Illinois
Posts: 178
Likes: 0
Received 0 Likes on 0 Posts
Default

any special proceedure to take out banjo bolt?
Old 12-02-2006, 09:16 PM
  #10  
Mighty Shilling
Wax On, Wax Off
Rennlist Member
 
Mighty Shilling's Avatar
 
Join Date: May 2003
Location: 5280 ft above the sea
Posts: 17,727
Likes: 0
Received 4 Likes on 4 Posts
Default

don't lose the washers...
Old 12-02-2006, 09:18 PM
  #11  
Mighty Shilling
Wax On, Wax Off
Rennlist Member
 
Mighty Shilling's Avatar
 
Join Date: May 2003
Location: 5280 ft above the sea
Posts: 17,727
Likes: 0
Received 4 Likes on 4 Posts
Default

What do you mean when you say the airbox isn't closing right?
Old 12-02-2006, 09:19 PM
  #12  
Mighty Shilling
Wax On, Wax Off
Rennlist Member
 
Mighty Shilling's Avatar
 
Join Date: May 2003
Location: 5280 ft above the sea
Posts: 17,727
Likes: 0
Received 4 Likes on 4 Posts
Default

Mostly, that's a problem being that you're getting dirt in the engine... and pitting your turbo. with any of the hoses on the turbo being loose, causing a leak, that's where the hiss is coming from. Also, check the intercooler pipes, to see if they're propperly attached. if they're not, you don't boost.
Old 12-02-2006, 09:24 PM
  #13  
Speed Demon
Instructor
Thread Starter
 
Speed Demon's Avatar
 
Join Date: Aug 2005
Location: Plainfield, Illinois
Posts: 178
Likes: 0
Received 0 Likes on 0 Posts
Default

I just went to the car and took of the intercooler pipe (btwn manifold and intercooler)

is it normal for it to be oily inside?

as i checked the J boot underneath.... i noticed that i was able to lift it up about an inch or two up...
(it is pretty loose


Air filter...


u know the air filter box has 4 screws to take off the filter... well only 3 screws are on b/c the plastic part that holds the two pieces broke...
Old 12-02-2006, 09:28 PM
  #14  
rberry951
Temprarily Banned per IB
 
rberry951's Avatar
 
Join Date: Aug 2006
Location: Upstate NY
Posts: 2,630
Likes: 0
Received 1 Like on 1 Post
Default

The seals in the turbo are probably going, hence the oil. Just go ahead and tighten the hose clamps on both ends of both intercooler pipes, and the one on the turbo side of the j-boot.

If the air box is closed and three screws tighten, you're fine.

Regards,
Russell
Old 12-02-2006, 09:32 PM
  #15  
Speed Demon
Instructor
Thread Starter
 
Speed Demon's Avatar
 
Join Date: Aug 2005
Location: Plainfield, Illinois
Posts: 178
Likes: 0
Received 0 Likes on 0 Posts
Default

i was supposed to check the banjo bolt o see if it was clogged right?

if so it wasn't


does the J boot go all the way to the turbo???


Quick Reply: More gas + No "PULL" =Bad BOV



All times are GMT -3. The time now is 08:16 PM.