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Old 08-31-2008, 01:55 PM   #1
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Question Coolant Temperature Sensor (CTS)

Does any one have a diagram that points out the location of the CTS sensor?
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Old 08-31-2008, 09:39 PM   #2
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Thermostat housing below the alternator area
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Old 09-01-2008, 01:27 AM   #3
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The reed switch will rarely give problem. Check the magnetic float then see where is the water goes at constant high rpm. I put 2 cm above the max water level and so far don't see any light coming up yet.
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Old 09-01-2008, 02:56 AM   #4
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Quote:
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The reed switch will rarely give problem. Check the magnetic float then see where is the water goes at constant high rpm. I put 2 cm above the max water level and so far don't see any light coming up yet.
He didn't ask about the level sensor. He wants to know where the temp sensor is, which was answered correctly.

That said, the level sensor in the bottle has a fairly high failure rate. Just search around here.
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Old 09-01-2008, 04:22 AM   #5
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thanks guys....I bought a GT tuner which usually clips in the air intake sensor, since the 8 has 5 wires the instructions reccomend to clip it to the CTS sensor. I am sure its not gonna make much of a difference in performance or fuel efficiency as the product brags but thought of giving it a try.
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Old 09-01-2008, 04:26 AM   #6
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Its just gonna make the car overheat.
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Old 09-01-2008, 02:09 PM   #7
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Did you already try it? Why do u say so?
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Old 09-01-2008, 02:21 PM   #8
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Because I know how the PCM works intimately and I know what the CTS does.
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Old 09-01-2008, 02:22 PM   #9
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Don''t mess with the CTS wiring...it will cause you tons of grief. It's one of the sensors that will throw the car into limp mode if the ECU doesn't like the readings it is giving.

You can't use cheap sensor mods to do ANYTHING on this car....
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Old 09-01-2008, 02:37 PM   #10
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MM knows a thing or two about our PCM. I'd listen to him.
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Old 09-01-2008, 02:42 PM   #11
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Nice try boo. I see you only have 5 posts. Have you tried reading the stickies in the tech section yet?

There's lots of good info in the tech section.
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Old 09-01-2008, 04:16 PM   #12
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this thread has failed.
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Old 09-01-2008, 11:03 PM   #13
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I guess I'll listen to the gurus' then
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Old 09-02-2008, 10:54 AM   #14
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Thanks MM for the correction

Here is the coolant temperature sensor location -

Click the image to open in full size.
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Old 09-02-2008, 11:46 AM   #15
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So basically this thread should be renamed "Where is my CTS? My performance chip needs it to tap..!!11"..
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Old 09-03-2008, 10:28 AM   #16
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Thnx CSL that's exactly what I was looking for....but I think I'm gonna listen to MM and not tap it....
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Old 03-17-2009, 11:11 AM   #17
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CTS and Squirls

Saturday my 8 started and died. I'm like great, its flooded now. Finally got it started and noticed my check engine light was on, the stability control dash light was on, and my engine temperature wouldn't budge. OBD said CTS failure. Bought one after finding the location on this thread so I could replace it. Looked for the CTS sensor and found a bunch of acorns beneath it and a chewed green wire on the connector. Took nearly two hours trying to splice that sucker as its a very tight fit. Found a bunch of acorns under the airbox also. Squirls and chipmonks love RX-8s too. I'm buying a BB gun.

Thanks for the schematic.
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Old 03-17-2009, 11:11 AM
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40f, bad, check, club, coolant, cts, engine, fc3s, light, limp, mw, pcm, problem, rx7, rx8, sensor, show, temp, temperature

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