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

Found a mysterious relay...

 
Post new topic   Reply to topic    924Board.org Forum Index -> General Discussions
View previous topic :: View next topic  
Author Message
felix83  



Joined: 05 Mar 2020
Posts: 16
Location: Sweden

PostPosted: Thu Apr 23, 2020 4:45 pm    Post subject: Found a mysterious relay... Reply with quote

Yesterday I found this relay in the battery box. The wiring going to it looks like it could have been done at the factory, but what does it do? The car has been on SORN since 2008 and I bought it a couple of months ago.
Edit: It's a 1977 Euro car.


_________________
Felix

'77 924
'82 911 SC

Instagram: @orebro.classics | @924.resurrection
Back to top
View user's profile Send private message
dogleg5  



Joined: 01 Apr 2020
Posts: 29
Location: No longer with us

PostPosted: Sat Apr 25, 2020 11:57 pm    Post subject: Reply with quote

Weird. I've tried searching both the numbers on the relay and nothing. My guesses are, headlight washers, security system, fog lights.
You could try starting the car and turning everything on and then unplug it and see what stops working. If the car dies, then you know it's something with fuel or ignition (which could be security system if you have that).
Back to top
View user's profile Send private message
Nobbi  



Joined: 24 Aug 2006
Posts: 1379
Location: Germany

PostPosted: Sun Apr 26, 2020 4:39 pm    Post subject: Reply with quote

Hello,

that relay is factory solution for the hot-start issue.I am not sure how it works but it builds up fuel pressure in the lines.

Nobbi
_________________
NA 924 - april/1977- 4-speed-audi gearbox.
500.000 km with fun.....and new toy:Porsche 944 S2 Cabriolet.Other car Daimler c-class cabby,brandnew..Plus : DEUTZ 4005 tractor Built 1969
Back to top
View user's profile Send private message
felix83  



Joined: 05 Mar 2020
Posts: 16
Location: Sweden

PostPosted: Tue Apr 28, 2020 5:21 pm    Post subject: Reply with quote

Nobbi wrote:
Hello,

that relay is factory solution for the hot-start issue.I am not sure how it works but it builds up fuel pressure in the lines.

Nobbi

Thanks! The engine starts fine without it (The ground cable had come off) but I haven't tested how well it starts when warm so that might very well be it. I traced the cable back, and it connects to a sensor at the back of the engine block.
_________________
Felix

'77 924
'82 911 SC

Instagram: @orebro.classics | @924.resurrection
Back to top
View user's profile Send private message
924RACR  



Joined: 29 Jul 2001
Posts: 8794
Location: Royal Oak, MI, USA

PostPosted: Tue Apr 28, 2020 9:09 pm    Post subject: Reply with quote

That sensor is probably the thermo time switch? Back of the head?

Or is it a 2-prong switch in the coolant line under the ignition coil?
_________________
Vaughan Scott
Webmeister
'79 924 #77 SCCA H Prod 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
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