Hey guys new to the forums so hello all.
Not sure if this is where I should post, if it isn’t then I am sorry.
Anyways I have an issue with my 90 integra overheating whenever I put the thermostat on.
The car warms up to normal temperature , but when I start driving it it heats up really quick.
This is my daily and its already on the cold season and don’t wanna jack up my car.
I’ve been running with no thermo for about 2 years now and could never find and issue even with multiple swaps.
My car is OBD-0
I am running
-b18c1 block
-98 type r head.
-chipped pr3 ecu
no CEL
my fan is also always on
-recently resurfaced my head and put in a new headgasket.
-my head has the sensor disconnected that goes to the thermostat housing.
And i still get no cel.
So I would appreciate any help I could get because my heater will not heat up at all… And I need it with these freezing temps.
And well pretty much my problem is my car overheats with thermostat. And it will not heat up with thermostat removed.
The weather is cold here now and my car is always seems to be at the coldest temperature.
Who wired your car? You say the fan is always on, and if the ECT switch (the thing you said is disconnected on the thermostat housing) is unplugged then the fan should never go on. Something is fishy with your fan wiring. But that shouldn’t have any relation to your overheating.
How many new thermostats have you tried? Have you tested them with boiling water and a thermometer?
Also, is the thermostat OEM or aftermarket?
[QUOTE=Colin;2304946]Who wired your car? You say the fan is always on, and if the ECT switch (the thing you said is disconnected on the thermostat housing) is unplugged then the fan should never go on. Something is fishy with your fan wiring. But that shouldn’t have any relation to your overheating.
How many new thermostats have you tried? Have you tested them with boiling water and a thermometer?
Also, is the thermostat OEM or aftermarket?[/QUOTE]
I got the car like this. Yes my fan every time i turn the ignition on it turns the fan on. I think I tried connecting it the correct way but it would never turn on.
Yea my fan wiring is not connected properly. I will get to that too.
I have tried two thermostats and both made my car heat up whenever I went around the block to test it… And no I have not tested the one I had for this. I will get to that tommarow when I get out of work to see if it opening properly.
Both thermostat tested were from auto zone.
for starters, as mentioned, wire the fan correctly. the fan will not engage with the tstat out. ever. so that’s why it probably never came on. either that or the switch could be faulty
second, go oem with the tstat. clearly, you’re having an issue overheating. you wanna cancel out any possible variables…like a junk tstat. start with those 2 corrections and then we can move forward
The fan is independent of the thermostat. The thermostat on indirectly affects the fan because it regulates the temp of the engine. The engine can reach proper operating temp with no thermostat if the conditions and ambient temp are right. In that instance the fan will only go on if the ECT switch is functioning properly.
He should ignore the fans for now, they are not his #1 problem. The fans, as they are now are helping to make the over cooling problem worse (when he runs without the thermostat) but they aren’t the root of the problem. Fixing the fan wiring would help the car heat up faster, but in cold weather and at speed he’s still going to to have over cooling. The fans can wait, he needs to focus on the overcooling/overheating problem so that he can drive the car.
Jon, for starters, stop buying shitty parts at local auto parts stores. Test your thermostat as illustrated in your Helms manual and let us know what you find out. Make sure its opening FULLY. You can probably find reference pictures online. I’ve seen aftermarket thermostats that start to open at the right temp but don’t open fully and don’t allow enough coolant flow. Without knowing what a fully open thermostat looks like you could assume its opening properly.
Oh…What the fuck then…
I have been using the car for over a year like this with no ECT connected, and i have ran it for over 3 hours non stop 186 miles up north in cali, and i have never had no CEL code thrown at me ever since the car has been running like this.
That is the ECT SENSOR code, we are talking about the ECT SWITCH. Just to complicate things there is also an ECT SENDING UNIT. Unified is correct in that if the ECT SWITCH is disconnected you will not get a CEL.
Okay i have the B18c1 block and the thermostat housing sensor is disconnected. Which would be the ECT Sensor correct?
i have checked the connecting that is not plugged in and it has a small thin wire along with it. And the small thin wire would be for the fan? and the big plug would be the one that connects to the ECT.
Is there an ECT sensor behind the block too next to the filter or is it just for the b18a1 block?
This weekend i am going to double check all those connections and see if the b18c1 block has a sensor next to the block.
You need to start referencing your Helms manual to help you sort all of this out. It’s much more simple than us trying to run around in circles explaining which thing is which. For a full explanation of the ECT parts and some other related sensors/switches, read, and re-read, and re-read: http://forums.g2ic.com/showthread.php?196564-Engine-Coolant-amp-Oil-Temp-amp-Pressure-Swiches-Sensors-amp-Sending-Units-Explained And consult your Helms for additional help and the wiring diagrams you’ll need to diagnose why it’s not hooked up properly. It’s probably a simple fix. People all too often screw up their fan wiring when their fan stops working. Instead of fixing the problem, which is usually a bad relay or related to incorrect wiring for an engine swap they just wire the fan to go on all the time.
It looks like that thermostat is opening fully, but it’s hard to tell from a pic. Use the procedure illustrated in your Helms manual to test:
a) If the thermostat is opening at the correct temperature
b) If the thermostat is opening all the way
It is fully opening, it is just its cold, and it’s cooling off pretty quick so by the time I was taking pics it was already closing off…
And thanks will check that out.
[QUOTE=Colin;2304956]The fan is independent of the thermostat. The thermostat on indirectly affects the fan because it regulates the temp of the engine. The engine can reach proper operating temp with no thermostat if the conditions and ambient temp are right. In that instance the fan will only go on if the ECT switch is functioning properly.
[/QUOTE]
pretty much every car that I’ve seen with the tstat pulled never reached full operating temp. then again, i’m not in cali
