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Temperature Gauge Mod instructions

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Old 04-10-2011, 02:17 PM
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Reviving this thread. My son has a 98 Camaro V6 and his temperature gauge reads 30+ degrees too hot. I verified this by hooking an OBDII scanner up and when reading about 240 on the factory gauge its actually running between 205 and 210, like I suspected.

Does anyone know how to correct or replace the temperature gauge?
Not really interested in putting an aftermarket gauge in the car.
TIA,
Jay
Old 08-04-2011, 12:07 AM
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That doesnt sound like a problem with the gauge..
Old 08-04-2011, 05:17 AM
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Originally Posted by SuperSpeed27
That doesnt sound like a problem with the gauge..
What? His gauge reads its too hot when really its 30+ degrees below what it shows? Sounds like a gauge issue to me
Old 08-04-2011, 05:23 PM
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When did they swirch from 2 to 1 temp sensors on the 3.8s? 99? I know at some point they had two one for the PCM and one for the gauge. If the 98s had two the gauge one may be faulty.
Old 08-04-2011, 07:35 PM
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Originally Posted by TexasVortexx
Reviving this thread. My son has a 98 Camaro V6 and his temperature gauge reads 30+ degrees too hot. I verified this by hooking an OBDII scanner up and when reading about 240 on the factory gauge its actually running between 205 and 210, like I suspected.

Does anyone know how to correct or replace the temperature gauge?
Not really interested in putting an aftermarket gauge in the car.
TIA,
Jay
Not sure if you're still dealing with this issue, but it could be due to the needle being pulled off of the cluster and reattached improperly. To fix it, try letting the car idle up to 205-210, then pull the needle off and reattach it pointing in the right direction.
Old 08-04-2011, 11:20 PM
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Hmm didnt think of that.
Old 09-30-2012, 07:41 PM
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Finally did this mod. The parts stores around here failed miserably on getting the right pigtail for the 3 pin sensor. Fortunately I'm not the type to avoid pondering things and seeing similarities.

Pick up a TPS pigtail for your car. It is the same connector. Since I have the neato Delphi terminal crimpers I ordered the connector & terminals from Racetronix, one of the sponsors on the right here :-). Their connector kit was $5 per and looks OEM when done (correct wire colors). I get picky on making sure my wiring always follows GM conventions.

The parts store TPS pigtail is gonna likely have 3 black wires in it and will need spliced (soldered) onto the harness...and was $15 at my local autozone.

I highly doubt the terminals would fit into the connector housing very well unless crimped correctly as they are VERY small. I suppose a person could crimp them as best they can and LIGHTLY solder them.
Old 07-07-2017, 09:23 AM
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The pictures don't show up now. Anyone have the pics?
Old 07-07-2017, 01:04 PM
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Originally Posted by HotSilverBird
Same with the temp gauge....it reads a average and shows it to you SO you don't see the gauge spiking high or low as the Tstat open etc BUT you are seeing a correct reading of the average temp of the engine. If it starts getting hooter the temp gauge will go up, same if it runs cooler.
Since this old thread is back up I just wanted to make clear that the above quote is incorrect. I think I ended up arguing with this same member about this topic in another thread as well, many years ago.

It's not an average reading because the '99+ cars will indicate just a hair under 210° before the coolant temp has even reached 210°. If the above quote were true, then coolant temp would have to exceed 210° for quite some time before the average would reach that value - and this is simply not what actually occurs. It is, in fact, possible to set the fan values in such a way as to prevent the coolant from ever reaching even 200°, and yet the stock gauge will still show just a hair under "210" once actual temp values have exceeded 185-190°F or so. I've logged this several times with my scanner during various tunes in the past.
Old 07-07-2017, 02:11 PM
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Rpm ws6- does someone still have the pics? This thread doesn't help unless you know where to cut the trace on the gauges.
Old 07-08-2017, 07:43 AM
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Bump come on someone still has to have the pics they were up like a week ago!
Old 07-10-2017, 04:22 PM
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Shout out to wssix99 who gave me the idea to search Google and I came across this which also has pics.
https://ls1tech.com/forums/stereo-electronics/520213-fixed-stock-coolant-temp-gauge-today.html



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