temp gauge drops when revving - Zilvia.net Forums | Nissan 240SX (Silvia) and Z (Fairlady) Car Forum

youarenottricky · 11-27-2009, 12:55 AM

so, i blew my radiator or water pump or something, and i replaced pretty much everything (radiator, all hoses, thermostat, water pump). after priming the block post-installation to get the air out of the system, my temp gauge is normal while idling, driving low speeds, or when in neutral, but when i rev the engine or am going above 35 in drive (yes i have an auto lol

), the gauge slams down to C like it wants to jump past the pin.

could this mean that there's still air in the system? or do i just need to clean/replace my temp sensor? or what?

Slammed Assassin · 11-27-2009, 01:01 AM

your temp sensor may be going bad, cheap replacement.

if anything try getting a aftermarket temp gauge as well, the oem ones suck.

SoguRacing · 11-27-2009, 01:02 AM

make sure the sensor is connected properly. as the actual temp of the water goes up resistance in the sensor increases. check resistance of the sensor or that it's connected properly and make sure that it's getting 5 volts reference. also if you can, jump the wires in the connector to make sure that it's reading properly. it could just be the gauge that is bad.

DataXUnknown · 11-27-2009, 01:52 AM

This happened to me in my SR. I forgot what I did to fix it...I think I just replaced the coolant temp sensor...

They are like 20 bucks or so..

youarenottricky · 11-27-2009, 02:17 AM

thanks for the info! ill look into getting a new temp sensor... i have a new gauge cluster waiting to be put in as well, since my speedo is buggy

johngriff · 11-27-2009, 12:34 PM

The sensor that drives that gauge is not the two wire temp sensor (thermistor) it is the 1 wire thermo-switch. Make sure you replace the right one.

DataXUnknown · 11-27-2009, 12:40 PM

Nissan OEM ECU Temperature Sensor S13 SR20DET KA24DE

Thats the one I remember buying. It was on the top of my intake manifold. Not sure if "johngriff" is talking about that one?

johngriff · 11-27-2009, 01:32 PM

Yeah, that is the wrong one to fix the gauge cluster

youarenottricky · 11-27-2009, 09:07 PM

Quote:

Originally Posted by johngriff

The sensor that drives that gauge is not the two wire temp sensor (thermistor) it is the 1 wire thermo-switch. Make sure you replace the right one.

where is this sensor? and do you know where can i buy a replacement?

youarenottricky · 11-27-2009, 09:09 PM

i should probably also note that my car has a KA24E, don't know if that makes a difference

BoostedCoupe · 11-27-2009, 10:10 PM

John is right, the red one is for the ecu. the one next to it is the gauge.

johngriff · 11-28-2009, 12:54 PM

Quote:

Originally Posted by BoostedCoupe

its the red sensor on the intake that the upper rad hose connects to the intake manifold.

No

NO

NO!

NO!!

It is not the colored two wire sensor! Its right next to it! It has one wire push on black square plastic connector, on a thick gauge black wire. Does not matter what engine type, all eccs nissans use this setup.

NISMO_tuner · 11-28-2009, 02:05 PM

FAE KA/SR Dash Gauge Temperature Sensor S13 Chassis

this is for the dash guage temp sensor

11-27-2009, 12:55 AM	#1
youarenottricky Leaky Injector Join Date: Oct 2009 Location: Lancaster, CA Posts: 109 Trader Rating: (0) Feedback Score: 0 reviews	temp gauge drops when revving so, i blew my radiator or water pump or something, and i replaced pretty much everything (radiator, all hoses, thermostat, water pump). after priming the block post-installation to get the air out of the system, my temp gauge is normal while idling, driving low speeds, or when in neutral, but when i rev the engine or am going above 35 in drive (yes i have an auto lol ), the gauge slams down to C like it wants to jump past the pin. could this mean that there's still air in the system? or do i just need to clean/replace my temp sensor? or what? __________________ "I may have been born yesterday, but I stayed up all night" - El-P

11-27-2009, 01:01 AM	#2
Slammed Assassin Nissanaholic! Join Date: Feb 2007 Location: Oxnard/SV Posts: 2,065 Trader Rating: (34) Feedback Score: 34 reviews	your temp sensor may be going bad, cheap replacement. if anything try getting a aftermarket temp gauge as well, the oem ones suck. __________________

11-27-2009, 01:02 AM	#3
SoguRacing Post Whore! Join Date: Nov 2007 Location: (714) Age: 39 Posts: 2,967 Trader Rating: (23) Rides Gallery: SoguRacing Feedback Score: 23 reviews	make sure the sensor is connected properly. as the actual temp of the water goes up resistance in the sensor increases. check resistance of the sensor or that it's connected properly and make sure that it's getting 5 volts reference. also if you can, jump the wires in the connector to make sure that it's reading properly. it could just be the gauge that is bad. __________________ Pre Tune Checkup! Compression,LeakDown,Vacuum Test $80. Cams Install: $180

11-27-2009, 02:17 AM	#5
youarenottricky Leaky Injector Join Date: Oct 2009 Location: Lancaster, CA Posts: 109 Trader Rating: (0) Feedback Score: 0 reviews	thanks for the info! ill look into getting a new temp sensor... i have a new gauge cluster waiting to be put in as well, since my speedo is buggy __________________ "I may have been born yesterday, but I stayed up all night" - El-P

11-27-2009, 12:34 PM	#6
johngriff Post Whore! Join Date: Jun 2004 Location: Long Beach, CA Posts: 4,103 Trader Rating: (4) Rides Gallery: johngriff Feedback Score: 4 reviews	The sensor that drives that gauge is not the two wire temp sensor (thermistor) it is the 1 wire thermo-switch. Make sure you replace the right one. __________________ [email protected]

11-27-2009, 01:52 AM	#4
DataXUnknown Post Whore! Join Date: Sep 2006 Location: Mission Viejo, CA Age: 35 Posts: 2,934 Trader Rating: (30) Rides Gallery: DataXUnknown Feedback Score: 30 reviews	This happened to me in my SR. I forgot what I did to fix it...I think I just replaced the coolant temp sensor... They are like 20 bucks or so..

11-27-2009, 12:40 PM	#7
DataXUnknown Post Whore! Join Date: Sep 2006 Location: Mission Viejo, CA Age: 35 Posts: 2,934 Trader Rating: (30) Rides Gallery: DataXUnknown Feedback Score: 30 reviews	Nissan OEM ECU Temperature Sensor S13 SR20DET KA24DE Thats the one I remember buying. It was on the top of my intake manifold. Not sure if "johngriff" is talking about that one?

11-27-2009, 01:32 PM	#8
johngriff Post Whore! Join Date: Jun 2004 Location: Long Beach, CA Posts: 4,103 Trader Rating: (4) Rides Gallery: johngriff Feedback Score: 4 reviews	Yeah, that is the wrong one to fix the gauge cluster __________________ [email protected]

11-27-2009, 09:09 PM	#10
youarenottricky Leaky Injector Join Date: Oct 2009 Location: Lancaster, CA Posts: 109 Trader Rating: (0) Feedback Score: 0 reviews	i should probably also note that my car has a KA24E, don't know if that makes a difference __________________ "I may have been born yesterday, but I stayed up all night" - El-P

11-27-2009, 10:10 PM	#11
BoostedCoupe Zilvia FREAK! Join Date: Nov 2006 Location: South Fulton, TN Age: 34 Posts: 1,043 Trader Rating: (4) Feedback Score: 4 reviews	John is right, the red one is for the ecu. the one next to it is the gauge. __________________ 92 vert converted 5speed and other little things Last edited by BoostedCoupe; 11-28-2009 at 01:02 PM..

11-28-2009, 02:05 PM	#13
NISMO_tuner Nissanaholic! Join Date: Apr 2008 Location: SoCal 818/562/714 Posts: 2,193 Trader Rating: (64) Feedback Score: 64 reviews	FAE KA/SR Dash Gauge Temperature Sensor S13 Chassis this is for the dash guage temp sensor __________________ Check my for sale thread for S13 parts