i recently installed my jdm sr20 after i threw a rod through the side of my old block.

anyway. since i've had it in, my temp guage reads hot all the time. from the time i start the car after sitting over night, it reads at optimum temp. after it warms up, it reads at or above HOT!!! i think it's the temp sensor, but i'm not sure, and i don't know which of the sensors it is. i think it's the one on the back of the block up just under the intake manifold, but again, i'm not sure.

any help will be much appreciated.

thanks guys,

Lance

throwing something out there:

thought you had to swap the JDM sensors with USDM sensors for things like coolant(ECU) and coolant(gauge).

you definately do if you swapped a lowport JDM de into a 91-93 b13


also, there are two temp senders. one for the ECU and one for the gauge. the one for the gauge has one pin, whereas the one for the ECU has an actual harness female end on it. your problem is related to the gauge temp sender (one pin). these are both located right next to eachother on the lower section of the intake manifold on the passenger side. they will be pointing right at your passenger wheel.

have you noticed strange cold idle problems, or running way to lean/rich when you start her cold? if so, that has to do with your coolant temp sender (ecu)

it was a high-port to high-port in a '93. so the sensor is over next to the manifold on the passenger side? is it on or below the manifold? a pic would help. i think i know which one you're talking about, i still have all the stuff. i just need to know which one for sure.

thanks

Lance

it was a high-port to high-port in a '93. so the sensor is over next to the manifold on the passenger side? is it on or below the manifold? a pic would help. i think i know which one you're talking about, i still have all the stuff. i just need to know which one for sure.

thanks

Lance
It is hard for me to try to tell you over the forum, as I don't have pics. If you want to call me, check your PMs my number is there. I can tell you really easily if you have your hood popped.

The two are side by side, the one with a single pin and strange looking harness plug is the one to your gauge. That is the one giving you problems with your gauge.

Chances are the coolant temp sender for the ECU is fine and you dont have to worry about it.

Yup, my guess is it'd run REAL funny if the sending unit for the ecu were shorted like the temp "gauge" sender likely is. There are two leads under the intake manifold on a water manifold that primarily sends water to the heater among other things. One is two leads, which is the one that goes to the ecu, the other is a single lead that goes to the temp 'gauge'. The single lead piece is the closer one to the block. Once you get the connector off, you should be able to get a 10mm box or socket over it (could be wrong on that, been a while, may have to use an open end). If one of your projects down the road is to add gauges, do add a temp gauge; the one on the dash is no more than a dial indicator idiot light. Cold, okay, and too late you are now the owner of a large paperweight. It DOES NOT accurately read temp for any early warning.
Jer

Yup, my guess is it'd run REAL funny if the sending unit for the ecu were shorted like the temp "gauge" sender likely is. There are two leads under the intake manifold on a water manifold that primarily sends water to the heater among other things. One is two leads, which is the one that goes to the ecu, the other is a single lead that goes to the temp 'gauge'. The single lead piece is the closer one to the block. Once you get the connector off, you should be able to get a 10mm box or socket over it (could be wrong on that, been a while, may have to use an open end). If one of your projects down the road is to add gauges, do add a temp gauge; the one on the dash is no more than a dial indicator idiot light. Cold, okay, and too late you are now the owner of a large paperweight. It DOES NOT accurately read temp for any early warning.
Jer

I believe it truely depends on who the last person was to work on the car. My gauge sender was furthest from the block. I think the two are interchangable in terms of location.

hmm, thanks guys.

taiden, i might call you if i have trouble finding it.

No doubt, T - I think the threads are the same. Who knows, it may have even varied from the factory. I've only looked at 3 or 4.

would this cause the car hard to start when its cold outside. the car is a b15 se with a gtir engine ad a AEM EMS on it.

Might want to check all your grounds. Especially the body ground to the chassis. If it's poor the voltage will feed back to the gauge and read higher than normal with all the current running through the system.