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MAT Sensor Location, 1986 305 4-bbl Auto Trans

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Old Jan 30, 2012 | 02:40 AM
  #1  
eca1987's Avatar
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From: Southern, Cali
Car: 1986 Trans AM
Engine: LG4-305-Edelbrock Intake/Q-Jet Carb
Transmission: Automatic
MAT Sensor Location, 1986 305 4-bbl Auto Trans

Greetings,

Just had a new Edelbrock 3701 Intake Manifold installed and I am now getting Trouble Code 23. MAT Sensor (Low Temp).

My suspicion is that the MAT sensor is supposed to be mounted on the intake manifold itself and either the Edelbrock intake doesn't support it, my Mechanic didn't hook it up or the sensor is bad.

Please let me know which is right, what it is supposed to look like, where it should be attached and the implications if I never hook it up?

Please include a picture or diagram if possible

Thanks,

Big Ed

Last edited by eca1987; Jan 30, 2012 at 02:43 AM. Reason: Spelling Error
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Old Jan 30, 2012 | 01:26 PM
  #2  
Ozz1967's Avatar
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From: St. Cloud, MN
Car: 1984 Trans Am
Engine: LS1383 in work
Transmission: Magnum F - to be installed
Axle/Gears: Zexel Torsen 3.73, 28-spline mosers
Re: MAT Sensor Location, 1986 305 4-bbl Auto Trans

Originally Posted by eca1987
Greetings,

Just had a new Edelbrock 3701 Intake Manifold installed and I am now getting Trouble Code 23. MAT Sensor (Low Temp).

My suspicion is that the MAT sensor is supposed to be mounted on the intake manifold itself and either the Edelbrock intake doesn't support it, my Mechanic didn't hook it up or the sensor is bad.

Please let me know which is right, what it is supposed to look like, where it should be attached and the implications if I never hook it up?

Please include a picture or diagram if possible

Thanks,

Big Ed
To my knowledge, there is no MAT sensor on carbed cars, but I could be wrong. My 84 doesn't have one unless it's the sensor that's in the thermostat housing.
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Old Jan 30, 2012 | 05:21 PM
  #3  
five7kid's Avatar
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From: Littleton, CO USA
Car: 82 Berlinetta/57 Bel Air
Engine: L92/LQ4 (both w/4" stroke)
Transmission: 4L80E/4L80E
Axle/Gears: 12B-3.73/9"-3.89
https://www.thirdgen.org/service-eng...ht-error-codes

For a carb'd car, code 23 is TPS. Make sure it's plugged in, the harness isn't pinched under something, etc.
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Old Feb 2, 2012 | 01:25 AM
  #4  
eca1987's Avatar
Thread Starter
Junior Member
 
Joined: Oct 2011
Posts: 28
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From: Southern, Cali
Car: 1986 Trans AM
Engine: LG4-305-Edelbrock Intake/Q-Jet Carb
Transmission: Automatic
Re: MAT Sensor Location, 1986 305 4-bbl Auto Trans

Pardon my ingnorance, but what is a TPS and where does it plug in? Where would I look for it? What does it look like?

Thanks for your help,

Bi Ed.
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Old Feb 2, 2012 | 04:57 PM
  #5  
five7kid's Avatar
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25 Year Member
iTrader: (14)
 
Joined: Mar 2000
Posts: 43,187
Likes: 46
From: Littleton, CO USA
Car: 82 Berlinetta/57 Bel Air
Engine: L92/LQ4 (both w/4" stroke)
Transmission: 4L80E/4L80E
Axle/Gears: 12B-3.73/9"-3.89
Throttle Position Sensor. White plug on the front driver side corner of the carb.

In the diagram https://www.thirdgen.org/forums/carb...e-rebuild.html , #71.
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