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coolant temp sensor location??

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Old Dec 22, 2013 | 01:52 AM
  #1  
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From: wenatchee WA
Car: 1988 Trans am GTA
Engine: 5.7 tpi
Transmission: auto
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coolant temp sensor location??

Hey guys I need to get the location confirmed its an 1988 trans am gta it has the 9th injector it's on the passenger side has 2 wires going to it?
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Old Dec 22, 2013 | 09:23 AM
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From: Mile High Country !!!
Car: 1967 Camaro, 91 z28
Engine: Lb9
Transmission: M20
Axle/Gears: J65 pbr on stock posi 10bolt
Re: coolant temp sensor location??

If you are asking were the timer switch for the csi is . it is on the front of the intake passengers side and is made bye Bosch. If your asking about the ecm cts it is the one under the coolant bypass hose on the front of the intake and uses a yellow and black wire. If you are asking about the coolant temp gauge sender it is in the cylinder head between cylinder 1 & 3. If your wondering what is in the passengers side cylinder head between 6&8 that is the secondary fan temp switch.
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Old Dec 22, 2013 | 09:51 AM
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From: wenatchee WA
Car: 1988 Trans am GTA
Engine: 5.7 tpi
Transmission: auto
Axle/Gears: 3.27 posi
The one I got looks like the brass one not the black one that's circled... what is the brass one?
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Old Dec 22, 2013 | 10:04 AM
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From: Mile High Country !!!
Car: 1967 Camaro, 91 z28
Engine: Lb9
Transmission: M20
Axle/Gears: J65 pbr on stock posi 10bolt
Re: coolant temp sensor location??

They both have brass bodies. The circled one is the ecm cts, the one on the left in the picture is the csi timer switch.
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Old Dec 22, 2013 | 12:41 PM
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From: wenatchee WA
Car: 1988 Trans am GTA
Engine: 5.7 tpi
Transmission: auto
Axle/Gears: 3.27 posi
Hey guys I think I found out why my temp gauge ain't working lol but I don't know how it connects the other end is like a nipple so does it go somewhere else?

coolant temp sensor location??-forumrunner_20131222_103920.png
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Old Dec 22, 2013 | 01:02 PM
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From: Mile High Country !!!
Car: 1967 Camaro, 91 z28
Engine: Lb9
Transmission: M20
Axle/Gears: J65 pbr on stock posi 10bolt
Re: coolant temp sensor location??

Thats would explain the gauge not working. You can retention the terminal. The connecter goes onto the nail head at a 90 degree straight up and down. Unless the has a male spade connecter.
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Old Dec 22, 2013 | 01:51 PM
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From: wenatchee WA
Car: 1988 Trans am GTA
Engine: 5.7 tpi
Transmission: auto
Axle/Gears: 3.27 posi
I'll try that
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Old Dec 22, 2013 | 03:02 PM
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From: wenatchee WA
Car: 1988 Trans am GTA
Engine: 5.7 tpi
Transmission: auto
Axle/Gears: 3.27 posi
Plugged it in everything works now lol thanks for all the help guys!
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Old Dec 22, 2013 | 03:03 PM
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From: wenatchee WA
Car: 1988 Trans am GTA
Engine: 5.7 tpi
Transmission: auto
Axle/Gears: 3.27 posi
I'll report in the morning if that helps my cold start problem I replaced the coolant temp sensor on the intake today as well
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Old Dec 22, 2013 | 04:26 PM
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From: Brick, NJ
Car: 91 Trans Am
Engine: 355 TPI
Transmission: Built T-5
Originally Posted by Terrence1725
I'll report in the morning if that helps my cold start problem I replaced the coolant temp sensor on the intake today as well
Make sure your battery was/is disconnected for at least 10 minutes before firing it to make sure the ECM is reset
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Old Dec 22, 2013 | 04:35 PM
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From: Mile High Country !!!
Car: 1967 Camaro, 91 z28
Engine: Lb9
Transmission: M20
Axle/Gears: J65 pbr on stock posi 10bolt
Re: coolant temp sensor location??

Originally Posted by 86T/A_Ram_Air
Make sure your battery was/is disconnected for at least 10 minutes before firing it to make sure the ECM is reset
The temp gauge isn't wired to the ecm
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Old Dec 22, 2013 | 05:40 PM
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From: wenatchee WA
Car: 1988 Trans am GTA
Engine: 5.7 tpi
Transmission: auto
Axle/Gears: 3.27 posi
I always disconnect the battery when messing with wiring I started it after 15 mins or so I took my time doing it fired right up ran to operating temp gonna change the oil after the game then it's sitting til tomorrow morning to see if the cold start bs is done
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Old Dec 22, 2013 | 05:41 PM
  #13  
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From: wenatchee WA
Car: 1988 Trans am GTA
Engine: 5.7 tpi
Transmission: auto
Axle/Gears: 3.27 posi
What can happen? If I didn't disconnect the battery?
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Old Dec 22, 2013 | 07:06 PM
  #14  
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From: Brick, NJ
Car: 91 Trans Am
Engine: 355 TPI
Transmission: Built T-5
Originally Posted by Tuned Performance

The temp gauge isn't wired to the ecm
I didnt think we were talking about the sender for the gauge. I was under the assumption we were talking about the sensor for the ecm

My bad for not reading the whole thread but I believe the OP has a digi dash
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Old Dec 22, 2013 | 07:30 PM
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From: Mile High Country !!!
Car: 1967 Camaro, 91 z28
Engine: Lb9
Transmission: M20
Axle/Gears: J65 pbr on stock posi 10bolt
Re: coolant temp sensor location??

we covered every sensor that touches coolant lol
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Old Dec 22, 2013 | 09:08 PM
  #16  
Terrence1725's Avatar
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From: wenatchee WA
Car: 1988 Trans am GTA
Engine: 5.7 tpi
Transmission: auto
Axle/Gears: 3.27 posi
Yup I even changed the oil and greased all my grease certs had to replace one I'll report in the morning on how it starts I've been having cold start issues but just driving around the station I seemed to notice a lil more bottom end power? Maybe I'm crazy but I swear lol
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Old Dec 23, 2013 | 11:11 AM
  #17  
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From: wenatchee WA
Car: 1988 Trans am GTA
Engine: 5.7 tpi
Transmission: auto
Axle/Gears: 3.27 posi
Well the cold start bs was not fixed... could it Be the connector? It looked fine but
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Old Dec 23, 2013 | 12:00 PM
  #18  
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From: Brick, NJ
Car: 91 Trans Am
Engine: 355 TPI
Transmission: Built T-5
Originally Posted by Terrence1725
Well the cold start bs was not fixed... could it Be the connector? It looked fine but
Take a ohm meter a test the wires back with the connector plugged in. And compare your readings to the reading at the sensor
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Old Dec 23, 2013 | 12:09 PM
  #19  
Terrence1725's Avatar
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From: wenatchee WA
Car: 1988 Trans am GTA
Engine: 5.7 tpi
Transmission: auto
Axle/Gears: 3.27 posi
Ok I'll try and do that
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Old Nov 12, 2016 | 08:57 PM
  #20  
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From: Washington
Car: 1989 IROC-Z
Engine: 5.7L V8
Re: coolant temp sensor location??

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