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Old 09-18-2005, 04:11 PM   #1
WingsOfSaturn
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Default ECTS and Temp Gauge Sensor Wiring

I am installing a 96 DOHC head into a 95 SL2. I do not want to tap a hole into the head for the temp gauge sensor. Has anyone ever spliced the single wire for the temp gauge sensor into the the non-ground wire that goes to the ECTS? Will doing this possibly mess with the PCM? My other possibility would be to tap a hole into the elbow water connection that goes to the intake manifold and install the temp gauge sensor there. If I mess this up it can easily be replaced, but not a head.

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Old 09-18-2005, 04:15 PM   #2
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Default Re: ECTS and Temp Gauge Sensor Wiring

I've heard of at least one person putting a tee in a heater hose and putting one there. It was in a post a while back. Sounded like it would work.

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Old 09-18-2005, 05:31 PM   #3
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Default Re: ECTS and Temp Gauge Sensor Wiring

Romzek, This is a crude way to do it, But I just put it here, Screwed it a bit and put a bunch of high temp RTV around it,

I'm sure it's not as accurate as it should be, But it's worked for the last two years.
I didn't want to do the drill & tap method either

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Old 09-18-2005, 05:36 PM   #4
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Default Re: ECTS and Temp Gauge Sensor Wiring

The gauge will change the impedance and mess with the computer if spliced into the CTS wiring.

Griff's idea has some merit though mechanics everywhere will assume the worst when they see it. The gauge only has to please you so if it's slightly off, so what? You even have the unique opportunity to get some more of these single-wire sensors epoxied to oil pans, transmission cooler lines, etc, and a rotating switch to flip between them.

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Old 09-18-2005, 07:29 PM   #5
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Default Re: ECTS and Temp Gauge Sensor Wiring

Great idea Griff. I'm going to try that. Looks like you used a brass sensor. I have a few left over ceramic ones that I am going to try it with. Dealer here charges $25 for the brass sensors so have to order them at Saturnparts.com/net.

And eljefino, good idea on multiple sensors. I may experiment with an oil temp sensor. Who cares what mechanics think, they are not touching my satties anyways.

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Old 10-22-2005, 05:25 PM   #6
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Default Re: ECTS and Temp Gauge Sensor Wiring

Update on my temp gauge sensor issue. I went ahead and installed a sensor in the elbow that goes into the intake manifold. So far works great and seems to give accurate temp readings.
Attached Images
File Type: jpg Temp Gauge Sensor.jpg (31.6 KB, 135 views)

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Old 10-22-2005, 05:36 PM   #7
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Default Re: ECTS and Temp Gauge Sensor Wiring

Romzek,
Nice job on the sensor. I wouldn't have thought about doing that. How tough was it. What size tap did you use?

Again nice job

Greg

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Old 10-22-2005, 09:45 PM   #8
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Default Re: ECTS and Temp Gauge Sensor Wiring

I do believe that it was a M10x1.0 tap. Was not too hard. I extended the wire with some solderless crip connectors and used some plumbers tape on the threads of the sensor. Feels a lot better knowing what the water temp is at.

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