miami

The coolant temperature guage is barely moving even after the car is driven 60+ miles. Any help would be appreciated.

MikTip

Normally its usually the sender, or a bad wire.
The guage is a rare item to go bad.

The sender can be ohmed with a voltmeter to test if its bad. As can the wires.

Check to make sure its connected.

Longwolf (Christian)

It could be the sensor that screws into the block up front where the coolant hose goes in. These seem to go bad after 100K or so.

miami

Is the sender the plug which screws into the bottom of the radiator with wires attached ?

QCRAZY

No, that "item" is the thermoswitch for your radiator fan. If your rad. fan quits...now you know where to look.

I know where you need to look to fix the temp guage in the 5-cyl...but your car has the 4-cyl, correct?? I have no idea on the 4-cyl!!

Sorry, I couldn't offer any more help!!
---
Andrew
90 80q
91 90
95 90q

MikTip

<center><img src="http://www.ibiblio.org/tkan/audi/auti1/engine.jpg"></center><p>In the picture, just aft of the #3 spark plug, the neck coming out of the head, with the long rad hose, has 2 senders in it. 1 on top 1 on bottom. The one on top is the guage sender. 1 on bottom is temp sensor for ECU.

Louis1

I have a 1990 Audi 100, and I've been told that it's the coolant temperature sensor that's bad on mine. Is that the one you are refering to?
If so, where can I buy it inexpensively ?
Please kindly let me know. Thank you.

BornAgainAudi

I've got a 92 100cs with a temp guage that works
when it feels like it.

I'd love to know where it's located on the 2.8L 12v

sam.

MikTip

Try Rod at TPC.1-800-472-1144 www.thepartsconnection.com

MikTip

<center><img src="http://pictureposter.audiworld.com/6607/tempsensorz.jpg"></center><p>#3 is fer da guage Item #7 fer de ECU