Two Sensors on Thermostat Housing
Senior Member
Joined: Mar 2003
Posts: 966
Likes: 2
From: NE Ohio
Car: 83 Z28
Engine: 305 (LG4)
Transmission: THM700R4
Axle/Gears: 10 bolt, 3.23 non-LS
One with wires is the temp sensor for the ECM.
One with vaccum lines is a temp sensor for the emissions AIR pump system.
One with vaccum lines is a temp sensor for the emissions AIR pump system.
Supreme Member
Joined: Jul 1999
Posts: 18,457
Likes: 16
From: Loveland, OH, US
Car: 4
Engine: 6
Transmission: 5
The one is for the ECM; however, the other is the thermal vacuum switch for the EFE (heat riser) system. You can see how it hooks up on this diagram; it's called "EFE TVS".
Senior Member
Joined: Mar 2003
Posts: 966
Likes: 2
From: NE Ohio
Car: 83 Z28
Engine: 305 (LG4)
Transmission: THM700R4
Axle/Gears: 10 bolt, 3.23 non-LS
my bad. I knew that one of the lines were common with the AIR system. But I guess that was the common source vac.
I will try to do better in the future.
I will try to do better in the future.
Thread
Thread Starter
Forum
Replies
Last Post
dbrochard
Engine/Drivetrain/Suspension Parts for Sale
13
Oct 3, 2015 12:43 PM
