Aftermarket temp gauge issues potentially?

[kingtube69]

Aftermarket temp gauge issues potentially?

Hi All, 

I've noticed some issues with my R33 GTST as of late. I was driving up the blue mountains the other day and noticed my temp slowly rising on my aftermarket temperature gauge but the dash gauge stayed in its normal position.

A few days later I was driving uphill and noticed the same issue again, temp was rising slowly to 90+ (which it never normally does). I had a passenger get my laptop out and check the temperature that was showing on my Haltech and it was sitting between 79 - 82 degrees despite the aftermarket gauge rising. 

It's worth mentioning that when I stop (at a set of lights etc) the temp goes back to somewhat normal.

I'm really not sure what is causing this but as a just-in-case I ordered three new sensors, ECU temp, Dash temp and aftermarket temp. Has anyone else had this happen to them before? The only two logical things I could think of were there is an airlock that is only affecting the aftermarket gauge based on its position or that the aftermarket gauge sensor is borked. 

This is the hose I have the sensor in for my aftermarket gauge
http://www.gktech.com/index.php/r33-silicone-radiator-hose-with-water-temp-fitting.html

Any help would be appreciated 

 

[Dose Pipe Sutututu]

sounds like an air pocket in the hose... can you get the sensor down deeper so it's touching the flow of the coolant?

[kingtube69]

Just now, Dose Pipe Sutututu said:

sounds like an air pocket in the hose... can you get the sensor down deeper so it's touching the flow of the coolant?

The sensor itself is on the underside of the hose so it seems pretty well submerged in the coolant probably halfway in the hose. I'll check if I have a pic on my build thread 

[jmknights93]

I'd offer you my gauge to test with but my car may be sold this weekend

[kingtube69]

8 minutes ago, jmknights93 said:

I'd offer you my gauge to test with but my car may be sold this weekend

All good bro, thanks anyway - I'm going to bleed the system anyway this arvo before I leave work haha. 

Thanks 

[kingtube69]

Think it's all sorted, the gauge is no longer being erratic - I noticed last night when I turn the lights off the gauge would drop 10+ degrees -_- 

Changed all sensors, bled the cooling system and redid some of the wiring again. 

Thanks for the input Johnny and Josh

[KiwiRS4T]

On 9/9/2016 at 1:25 PM, kingtube69 said:

 

I've noticed some issues with my R33 GTST as of late. I was driving up the blue mountains the other day and noticed my temp slowly rising on my aftermarket temperature gauge but the dash gauge stayed in its normal position.

 

If it was just this that would be normal. ^^^

The stock gauge is programmed to stay in the normal zone until it is really getting hot so that people don't get excited about minor fluctuations. However the fact that the ecu sensor is also staying in the normal zone does point to the aftermarket gauge being the odd man out.

[niZmO_Man]

As above, factory gauge is 'normalised', that's why it jumps to the middle quickly and stays there until your engine's very hot, kind of useless to us but keeps the "general public" drivers a bit less worried.