Home  |  Forums  |  914 Info  |  Blogs
 
914World.com - The fastest growing online 914 community!
 
Porsche, and the Porsche crest are registered trademarks of Dr. Ing. h.c. F. Porsche AG. This site is not affiliated with Porsche in any way.
Its only purpose is to provide an online forum for car enthusiasts. All other trademarks are property of their respective owners.
 

Welcome Guest ( Log In | Register )

> temp gauge
arsprod
post May 17 2015, 04:26 PM
Post #1


Member
**

Group: Members
Posts: 210
Joined: 14-March 15
From: Indianapolis
Member No.: 18,519
Region Association: Upper MidWest
The temp gauge above my fuel gauge isn't working. For the life of me I cannot find any mention of it in the Haynes manual I have or even in the owners manual. Where's the sending unit for this thing? 74 2.0
User is offlineProfile CardPM
Go to the top of the page
+Quote Post
2 Pages V  1 2 >  
 Reply to this topicStart new topic
Replies(1 - 19)
type47
post May 17 2015, 05:28 PM
Post #2


Viermeister
****

Group: Members
Posts: 4,254
Joined: 7-August 03
From: Vienna, VA
Member No.: 994
Region Association: MidAtlantic Region
QUOTE(arsprod @ May 17 2015, 02:26 PM) *

Where's the sending unit for this thing?


Located in the engine sump. Also called the "taco plate" so if you need to buy the temp sender, that's what you can search for and ask for. Same temp sender would be for the console temp gauge. Your combo gauge with oil temp was installed by the factory to those cars not equipped with the center console. Here's a pic of the taco plate:
Attached Image
Attached Image

Maybe you just need to verify the wire from the sender to the harness connector just below the battery tray.
User is offlineProfile CardPM
Go to the top of the page
+Quote Post
arsprod
post May 17 2015, 05:33 PM
Post #3


Member
**

Group: Members
Posts: 210
Joined: 14-March 15
From: Indianapolis
Member No.: 18,519
Region Association: Upper MidWest
Thank you! I was looking at that yesterday though mine's not nearly so clean.
User is offlineProfile CardPM
Go to the top of the page
+Quote Post
914Sixer
post May 17 2015, 07:30 PM
Post #4


914 Guru
*****

Group: Members
Posts: 9,123
Joined: 17-January 05
From: San Angelo Texas
Member No.: 3,457
Region Association: Southwest Region
Wire is green with red stripe. Heat and time have caused most of the wires to get brittle and break under the sheath giving you no reading at the gauge.
User is offlineProfile CardPM
Go to the top of the page
+Quote Post
arsprod
post May 23 2015, 11:28 AM
Post #5


Member
**

Group: Members
Posts: 210
Joined: 14-March 15
From: Indianapolis
Member No.: 18,519
Region Association: Upper MidWest
QUOTE(914Sixer @ May 17 2015, 09:30 PM) *

Wire is green with red stripe. Heat and time have caused most of the wires to get brittle and break under the sheath giving you no reading at the gauge.


Could it be green/black on 74? There's 1 wire under battery box that's not going to the fuel pump and it's green/black. From my reading in Haynes manual that's correct
User is offlineProfile CardPM
Go to the top of the page
+Quote Post
type47
post May 23 2015, 03:48 PM
Post #6


Viermeister
****

Group: Members
Posts: 4,254
Joined: 7-August 03
From: Vienna, VA
Member No.: 994
Region Association: MidAtlantic Region
QUOTE(arsprod @ May 23 2015, 09:28 AM) *

Could it be green/black on 74?


http://www.pelicanparts.com/914/parts/Elec...lectric_74D.jpg

G8 and G9 are temp sender and temp indicator and the wire is indeed green/blk (track 53 and 54)

Legend: http://www.pelicanparts.com/914/parts/Elec...lectric_74F.jpg
User is offlineProfile CardPM
Go to the top of the page
+Quote Post
arsprod
post May 23 2015, 06:13 PM
Post #7


Member
**

Group: Members
Posts: 210
Joined: 14-March 15
From: Indianapolis
Member No.: 18,519
Region Association: Upper MidWest
QUOTE(type47 @ May 23 2015, 05:48 PM) *

QUOTE(arsprod @ May 23 2015, 09:28 AM) *

Could it be green/black on 74?


http://www.pelicanparts.com/914/parts/Elec...lectric_74D.jpg

G8 and G9 are temp sender and temp indicator and the wire is indeed green/blk (track 53 and 54)

Legend: http://www.pelicanparts.com/914/parts/Elec...lectric_74F.jpg


Great thanks. So, I'm assuming if I either ground or put power to the wire going to the gauge it should give a reading or move? I get continuity to the taco but nothing back to the gauge.
User is offlineProfile CardPM
Go to the top of the page
+Quote Post
SKL1
post May 23 2015, 09:25 PM
Post #8


Senior Member
***

Group: Members
Posts: 1,685
Joined: 19-February 11
From: north Scottsdale
Member No.: 12,732
Region Association: Upper MidWest
Get a new sending unit for the taco plate and put a new wire back to the gauge. I sent my gauge to North Hollywood Speedometer and had them put numerials on it and with a new sending unit works great! Now I actually know the temp!
User is offlineProfile CardPM
Go to the top of the page
+Quote Post
steuspeed
post May 24 2015, 01:08 AM
Post #9


Senior Member
***

Group: Members
Posts: 1,010
Joined: 12-July 11
From: Portland, Oregon
Member No.: 13,308
Region Association: Pacific Northwest
QUOTE(SKL1 @ May 23 2015, 08:25 PM) *

... I sent my gauge to North Hollywood Speedometer and had them put numerials on it and with a new sending unit works great! Now I actually know the temp!



Good idea right there. Photo?
User is offlineProfile CardPM
Go to the top of the page
+Quote Post
arsprod
post May 24 2015, 06:57 AM
Post #10


Member
**

Group: Members
Posts: 210
Joined: 14-March 15
From: Indianapolis
Member No.: 18,519
Region Association: Upper MidWest
QUOTE(SKL1 @ May 23 2015, 11:25 PM) *

Get a new sending unit for the taco plate and put a new wire back to the gauge. I sent my gauge to North Hollywood Speedometer and had them put numerials on it and with a new sending unit works great! Now I actually know the temp!


I like that idea - spend time making it work rather then tracking what's broken!
User is offlineProfile CardPM
Go to the top of the page
+Quote Post
arsprod
post May 24 2015, 07:44 AM
Post #11


Member
**

Group: Members
Posts: 210
Joined: 14-March 15
From: Indianapolis
Member No.: 18,519
Region Association: Upper MidWest
This the correct part? http://www.egauges.com/ProductDetails.asp?...uctCode=323-055
User is offlineProfile CardPM
Go to the top of the page
+Quote Post
arkitect
post May 24 2015, 08:24 AM
Post #12


Senior Member
***

Group: Members
Posts: 617
Joined: 3-March 10
From: Stockton, CA
Member No.: 11,426
Region Association: None
QUOTE(SKL1 @ May 23 2015, 08:25 PM) *

Get a new sending unit for the taco plate and put a new wire back to the gauge. I sent my gauge to North Hollywood Speedometer and had them put numerials on it and with a new sending unit works great! Now I actually know the temp!


Any pictures of this? Great idea.

Dave
User is offlineProfile CardPM
Go to the top of the page
+Quote Post
Java2570
post May 24 2015, 08:43 AM
Post #13


Senior Member
***

Group: Members
Posts: 649
Joined: 7-May 11
From: Fishers, IN
Member No.: 13,035
Region Association: Upper MidWest
QUOTE(arsprod @ May 24 2015, 09:44 AM) *

This the correct part? http://www.egauges.com/ProductDetails.asp?...uctCode=323-055


That sender won't match the temp gauge in the combo gauge in your dash. The combo temp gauge needs a 200C sender and the VDO 323-055 is a 150C. I don't think a sender is available anymore for the combo gauge. If you place a WTB ad in classifieds, someone may have a good used one for you. You can also put in a VDO Cockpit gauge in your console or other location that can utilize the 323-055 sender.
User is offlineProfile CardPM
Go to the top of the page
+Quote Post
brant
post May 24 2015, 10:07 AM
Post #14


914 Wizard
**********

Group: Members
Posts: 11,949
Joined: 30-December 02
From: Colorado
Member No.: 47
Region Association: Rocky Mountains
I am facing the same problem
is there anyway to test the sender without removing it?
maybe cold, then after the motor is warmed up?

haven't gotten under there yet to examine the wire
User is offlineProfile CardPM
Go to the top of the page
+Quote Post
bdstone914
post May 24 2015, 12:03 PM
Post #15


bdstone914
****

Group: Members
Posts: 4,906
Joined: 8-November 03
From: Riverside CA
Member No.: 1,319
Measure the resistance from the center terminal to ground. It should change with temperature. It is very sensitive. Heat it or cool it. Usually not the sender that goes bad.

Open curcuit or 0 resistance it is bad. I tested one recently. I think it was about 200 ohms at room temp
User is offlineProfile CardPM
Go to the top of the page
+Quote Post
bdstone914
post May 24 2015, 12:08 PM
Post #16


bdstone914
****

Group: Members
Posts: 4,906
Joined: 8-November 03
From: Riverside CA
Member No.: 1,319
QUOTE(Java2570 @ May 24 2015, 07:43 AM) *

QUOTE(arsprod @ May 24 2015, 09:44 AM) *

This the correct part? http://www.egauges.com/ProductDetails.asp?...uctCode=323-055


That sender won't match the temp gauge in the combo gauge in your dash. The combo temp gauge needs a 200C sender and the VDO 323-055 is a 150C. I don't think a sender is available anymore for the combo gauge. If you place a WTB ad in classifieds, someone may have a good used one for you. You can also put in a VDO Cockpit gauge in your console or other location that can utilize the 323-055 sender.



Yes 150 C is the correct sender. 200 C will not work. That sender has a shorter probe but is the correct thread. The original has straight terminal but you should be able to make that work.
User is offlineProfile CardPM
Go to the top of the page
+Quote Post
Java2570
post May 24 2015, 02:56 PM
Post #17


Senior Member
***

Group: Members
Posts: 649
Joined: 7-May 11
From: Fishers, IN
Member No.: 13,035
Region Association: Upper MidWest
This thread has a ton of good oil temp info: http://www.914world.com/bbs2/index.php?showtopic=97987

Sorry, didn't see the post about redoing the calibration of the combo gauge before I posted my previous, that would be a great idea.
User is offlineProfile CardPM
Go to the top of the page
+Quote Post
arsprod
post May 24 2015, 05:55 PM
Post #18


Member
**

Group: Members
Posts: 210
Joined: 14-March 15
From: Indianapolis
Member No.: 18,519
Region Association: Upper MidWest
Hmm... maybe just replacing wire is the answer
User is offlineProfile CardPM
Go to the top of the page
+Quote Post
SKL1
post May 24 2015, 06:36 PM
Post #19


Senior Member
***

Group: Members
Posts: 1,685
Joined: 19-February 11
From: north Scottsdale
Member No.: 12,732
Region Association: Upper MidWest
Here's a picture of the gauge panel before I put it back in the car, with temp gauge in the middle.Attached Image
User is offlineProfile CardPM
Go to the top of the page
+Quote Post
arsprod
post May 31 2015, 07:56 AM
Post #20


Member
**

Group: Members
Posts: 210
Joined: 14-March 15
From: Indianapolis
Member No.: 18,519
Region Association: Upper MidWest
So I've confirmed a connection from sender to gauge and no luck. I assumed it was the sender but based on bdstone914's comment I checked resistance and it looks OK. So, now I'm thinking it's the gauge (argh). Is there a test for the gauge?
User is offlineProfile CardPM
Go to the top of the page
+Quote Post
« Next Oldest · 914World Garage · Next Newest »
 

2 Pages V  1 2 >
Reply to this topicStart new topic
1 User(s) are reading this topic (1 Guests and 0 Anonymous Users)
0 Members:

 

Display Mode: Switch to: Standard · Linear+ · Switch to: Outline

Track this topic · Email this topic · Print this topic · Subscribe to this forum

- Lo-Fi Version Time is now: 9th May 2025 - 03:08 PM
Invision Power Board v9.1.4 © 2025  IPS, Inc.
All rights reserved 914World.com © since 2002
914World.com is the fastest growing online 914 community!
We have it all, classifieds, events, forums, vendors, parts, autocross, racing, technical articles, events calendar, newsletter, restoration, gallery, archives, history and more for your Porsche 914 ...