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

Help: Unknown wire connector

 
Post new topic   Reply to topic    924Board.org Forum Index -> General Discussions
View previous topic :: View next topic  
Author Message
mr_caarl  



Joined: 21 Mar 2019
Posts: 8
Location: Sweden

PostPosted: Thu Jan 23, 2020 4:31 am    Post subject: Help: Unknown wire connector Reply with quote

I found an empty wire connector but no stray wires near by.

Probably a stupid question but does anyone know what the connector is for?



[/img]
Back to top
View user's profile Send private message
!tom  



Joined: 28 Aug 2006
Posts: 1898
Location: Victoria, BC Canada

PostPosted: Thu Jan 23, 2020 7:54 am    Post subject: Reply with quote

It would help to know the particulars of your car, as things such as this changed depending on the model year of the car.

It might very well be a fuel pump relay cutoff switch, which causes the fuel pump to shut off if the engine stalls. One use case for such a feature is to shut off the fuel pump in case of a crash.

My recollection of when I was looking into this feature on my car is if the connector is disconnected, the fuel pump will run regardless of if the engine is running or not, but if it is connected, the fuel pump will only run if air is deflecting the air flow plate.

Might be different for your car...
_________________
78 924 NA
5-lug
Back to top
View user's profile Send private message Visit poster's website
mr_caarl  



Joined: 21 Mar 2019
Posts: 8
Location: Sweden

PostPosted: Thu Jan 23, 2020 8:19 am    Post subject: Reply with quote

Sorry, I should have given more details.

The car: Porsche 924 n/a, Euro version -79.

I checked the fuelpump relay wiring. The "cut off switch"/on-signal for the relay is wired to the ignition coil (same connector as the tachometer). This seems correct and the fuelpumps are running as expected so the connector in the image must be for something else?

The only stray/loose wire i can find in the engine bay is the signal wire for the engine temperature indicator (the indicator is obviously not working). But the wire is located at the back of the engine bay close to the firewall and the connector more at the front. So i assume its not the connector for the temp gauge?
Back to top
View user's profile Send private message
924RACR  



Joined: 29 Jul 2001
Posts: 8300
Location: Royal Oak, MI, USA

PostPosted: Thu Jan 23, 2020 11:01 pm    Post subject: Reply with quote

That's definitely the fuel pump cutoff switch, but for the early cars; makes one wonder if perhaps the air flow meter was swapped in from an earlier car at some point.
_________________
Vaughan Scott
Webmeister
'79 924 #77 ITB racecar
'82 931 Plat. Silver
#25 Hidari Firefly P2 sports prototype
Back to top
View user's profile Send private message Send e-mail Visit poster's website
mr_caarl  



Joined: 21 Mar 2019
Posts: 8
Location: Sweden

PostPosted: Thu Jan 23, 2020 11:38 pm    Post subject: Reply with quote

I wouldnt be suprised if the air flow meter has been swapped at some point.

Thanx for the help!

Moving on to the next problem. Does anyone have a good picture or description on where i can locate the engine temperature sensor (not the cooling fan sensor)?

I found the wire in the engine bay close to the firewall but i cant find the sensor or where the wire should connect.
Back to top
View user's profile Send private message
Ozzie  



Joined: 12 Mar 2005
Posts: 4446
Location: Townsville, Qld. Australia

PostPosted: Sat Jan 25, 2020 7:05 am    Post subject: Reply with quote

on housing the rear water hose comes off the back of motor, looks like a nail head
_________________
Porsche 924 1984 (UK import) NA
Its AUTO and its BLACK
Montego Black on black/red
Engineer of Electro/Mechanical Systems Maintenance
Back to top
View user's profile Send private message Send e-mail
Display posts from previous:   
Post new topic   Reply to topic    924Board.org Forum Index -> General Discussions All times are GMT + 10 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