Temperature Gauge

Reply Subscribe

Thread Tools

Search this Thread

Nov 9, 2005 | 07:00 PM

RMS

Thread Starter

Navigator

Joined: Oct 2005

Posts: 9

Likes: 0

Temperature Gauge

Just Bought 94...gauge Shows 210 Degrees While Moving...at Stop, It Goes To 235...turn On Ac It Goes Back To 210...

Replaced Sending Unit...no Change

Thermostat?

Or Something Else?

Please Help...thanks

Nov 9, 2005 | 07:03 PM

FD2BLK

Safety Car

Joined: Dec 2002

Posts: 3,655

Likes: 24

From: Charleston SC

Sounds normal. THe reason it drops with the A/C on is that when you turn the A/C on it commands the ECM to run the fan.

Nov 9, 2005 | 07:25 PM

dave_85

Pro

Joined: Dec 2002

Posts: 522

Likes: 3

From: Rolling Meadows IL

You should check the front of the raditor, you need to pull the top
plastic cover off to get to it. You can't tell by looking at the A/C condensor.

Nov 9, 2005 | 08:31 PM

CFI-EFI

Race Director

Joined: Sep 2000

Posts: 17,298

Likes: 32

From: The Top of Utah

Quote:

Originally Posted by RMS

No matter how hard you work to "fix" that gauge, until you break something in the process, it is going to continue to read correctly. C4s run warm and your gauge doesn't indicate anything too unusual. What dave_85 is trying to say, is that the C4s are famous for sucking up garbage off the road and packing it in, in between the A/C condenser and the radiator. Pull the upper air baffle off the top of your radiator and clean out between the two. Make sure your cooling system has been serviced properly and within a reasonable time interval. Otherwise, your temp readings are pretty normal.

RACE ON!!!

Nov 10, 2005 | 02:38 PM

1990 c4

Advanced

Joined: Oct 2005

Posts: 74

Likes: 0

From: Halifax Va

Cruise-In VII Veteran

If you don't particularly like to run temperature that high, it's a simple fix to wire in a manual override switch so you can turn the fans on manually when you want to.

David

Nov 10, 2005 | 05:11 PM

SJW

Le Mans Master

Joined: May 2005

Posts: 7,299

Likes: 2,219

From: Central Maryland

Quote:

Originally Posted by 1990 c4

If you don't particularly like to run temperature that high, it's a simple fix to wire in a manual override switch so you can turn the fans on manually when you want to.

David

Or, you can reprogram your ECM to alter the fan on/off settings, so that they do whatever you want them to do automatically. I did this, and am very happy with the changes.

Congrats on your new Vette. Here's hoping you enjoy it for all it's worth.

Be well,

SJW

Nov 10, 2005 | 05:51 PM

00Nassau

Safety Car

Joined: Jun 2000

Posts: 4,151

Likes: 98

From: Conroe TX

St. Jude Donor '11

A high-flow low temperature thermostat helped in my 95.

Nov 10, 2005 | 06:14 PM

jrzvette

Safety Car

Joined: Sep 2002

Posts: 4,971

Likes: 9

From: The reason time exists is so everything doesn't happen at once

Also make sure that all of the air has been burped out of the system. When the engine is cold remove the cap from the top expansion tank and fill with coolant. The run the car with the cap off. As the coolant circulates the level in the expansion tank will go down. Continue adding coolant until the tank remains full, then add coolant to the bottom overflow tank filling it to the "hot" level. Replace the cap, shut off the engine and let it cool down, then check the level again.