Show full size 924Board.org
Discussion Forum of 924.org
 
 FAQFAQ   SearchSearch   MemberlistMemberlist   UsergroupsUsergroups   RegisterRegister 
 ProfileProfile   Log in to check your private messagesLog in to check your private messages   Log inLog in 
 Technical FAQ924 FAQ (Technical)   Technical924 Technical Section   Jump to 924.org924.org   Jump to PCA 924 Registry924 Registry

bogging out at 3500 to 4000rpms

 
Post new topic   Reply to topic    924Board.org Forum Index -> 931 Discussion
View previous topic :: View next topic  
Author Message
porsche931US  



Joined: 05 Apr 2003
Posts: 5

PostPosted: Sat Apr 05, 2003 9:59 am    Post subject: bogging out at 3500 to 4000rpms Reply with quote

I have a 81' 924 turbo that for some reason bogs out at about 3 to 4 thousand rpms. I was just wondering if anyone had an idea about what could be causing this problem . Thanks!
Back to top
View user's profile Send private message
Lizard  



Joined: 03 Nov 2002
Posts: 9379
Location: Abbotsford BC. Canada

PostPosted: Sat Apr 05, 2003 10:17 am    Post subject: Reply with quote

clean/new distributor cap and rotor, basic tune up, or the DITC box, O2 sensor
_________________
3 928s,
Back to top
View user's profile Send private message Send e-mail
Smoothie  



Joined: 01 Jan 2003
Posts: 8029
Location: DE (the one near MD, PA, NJ)

PostPosted: Sat Apr 05, 2003 12:05 pm    Post subject: Reply with quote

Have a look at my posts here:
http://www.924board.org/viewtopic.php?p=47756
I had your symptoms and the prob was with the lower pressure pipe to turbo connection, and due to lower pressure pipe to block mounting bracket being not attached.
_________________
"..it's made in Germany. You know the Germans always make good stuff."
- shamwow guy

'82 924T, US version, dark green metallic, 5 speed Audi 016G gearbox
Back to top
View user's profile Send private message Visit poster's website
Silverarrow  



Joined: 09 Nov 2002
Posts: 23
Location: Ames, IA

PostPosted: Sat Jul 26, 2003 3:45 am    Post subject: bogs out a 3500-4000 rpm Reply with quote

I had a similar problem with my 80 931. I discovered it needed a better engine ground. Now I get power on to the redline. Also check the fuels supply and filter(s). there are many ways that problem can occur. But a poor ground to the engine can make a lot of problems. Like Do you have a problem with the temp guage not reading properly? Other intermittent electrical things happening? a lot of german car problems seem to be caused by poor grounding of the engine and chassis. I don't post much but I post what I know. Let me know what you find.
_________________
1977 924 NA no sunroof
1980 931 With a sunroof
I could be crazy, Oh yes I could!
Back to top
View user's profile Send private message Send e-mail
CMXXXI  



Joined: 05 Nov 2002
Posts: 1939
Location: Vicksburg, MS

PostPosted: Sat Jul 26, 2003 4:18 am    Post subject: Reply with quote

I've had symptoms of running ragged in the upper RPM range because of vacuum leaks. I'd start with the easy to check and fix stuff first, before starting to replace parts. Do as Smoothie suggests and double check your pressure ducting, and it never hurts to verify all your vacuum lines are connected, not broken, cracked or loose.
_________________
'79 Eurospec 931
Back to top
View user's profile Send private message Send e-mail Visit poster's website
924martinirossi  



Joined: 04 Nov 2002
Posts: 605
Location: Seattle, Washington, USA

PostPosted: Tue Jul 29, 2003 1:16 pm    Post subject: Reply with quote

I also had a problem like that and my WUR caused it. The control pressure was the same as the fuel pressure.

Michael
Back to top
View user's profile Send private message Send e-mail Visit poster's website
Display posts from previous:   
Post new topic   Reply to topic    924Board.org Forum Index -> 931 Discussion All times are GMT + 11 Hours
Page 1 of 1

 
Jump to:  
You cannot post new topics in this forum
You cannot reply to topics in this forum
You cannot edit your posts in this forum
You cannot delete your posts in this forum
You cannot vote in polls in this forum


Powered by phpBB © 2001, 2005 phpBB Group