2 coolant temp sensors?
Thread Starter
Joined: Jul 2010
Posts: 833
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From: The Jersey Shore
Car: 1991 Firebird Convertible
Engine: 5.7 L98
Transmission: 700R4
Axle/Gears: 3.45 9 Bolt Posi
2 coolant temp sensors?
I belive the TBI has 2 ect sensors, 1 for the gauge and one for the ecm. Which one gives teh input to teh scanner if you were monitering it on a snap on scanner? And which one is the one right next to the thermostat? Where is the other one?
Supreme Member
Joined: Sep 2002
Posts: 9,192
Likes: 19
From: Cary, North Carolina
Car: 1992 RS
Engine: Carbed 350
Transmission: 700R4
Axle/Gears: 3.42 posi
Re: 2 coolant temp sensors?
The one next to thermostat feeds the ECM (and thus your scanner) the info - this one has 2 wires (yellow and black). The other one feeds the gauge, and is located in the driver side head between #1 and #3 spark plugs, has a single green wire to it.
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