 What does Head Temperature Sensor 2 do?, Car started acting up like vapor lock again.... |
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| second wind |
 Jul 5 2020, 04:59 PM
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#1
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Senior Member  Group: Members Posts: 857 Joined: 30-December 10 From: Los Angeles, California Member No.: 12,543 Region Association: Southern California 
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Hello World,
So my '73 2.0 started acting like it had vapor lock again which is not likely since I relowed the fuel pump up front which totally cured that problem. So out of nowhere it started to not want to start after a several minute drive. Would finally start again after a 10-15 minute wait but this behavior had disappeared since the fuel pump relocation and is now back again. I thought I would use my BG cleaner machine on the throttle body which usually works wonders and noticed that I had a broken wire going to the head temperature sensor on the plenum, which I am told is called the head temperature sensor 2. What exactly does this sensor do and what do my symptoms sound like to you guys? Appreciate the help. Thank you and best regards, gg |
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| JeffBowlsby |
Jul 5 2020, 09:31 PM
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#2
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914 Wiring Harnesses Group: Members Posts: 8,533 Joined: 7-January 03 From: San Ramon CA Member No.: 104 Region Association: None
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TS1 or the intake air sensor mounts to the air plenum. It senses intake air temp. Unplug it from the harness and it riches the mix.
TS2 mounts to the cyl head near cyl3 and senses head operating temps, which richens the mix when cold, leans it out when warmed up. If TS2 is unplugged the engine will not start because it think s it is full rich. |
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| second wind |
Jul 5 2020, 10:14 PM
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#3
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Senior Member Group: Members Posts: 857 Joined: 30-December 10 From: Los Angeles, California Member No.: 12,543 Region Association: Southern California
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QUOTE(JeffBowlsby @ Jul 5 2020, 08:31 PM)  TS1 or the intake air sensor mounts to the air plenum. It senses intake air temp. Unplug it from the harness and it riches the mix. TS2 mounts to the cyl head near cyl3 and senses head operating temps, which richens the mix when cold, leans it out when warmed up. If TS2 is unplugged the engine will not start because it think s it is full rich. Thank you Jeff...what do you think my symptoms sound like? So TS1 is on the plenum and TS2 is back on the engine? Please repeat and I appreciate your reply. Thank you, gg |
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Posts in this topic
second wind What does Head Temperature Sensor 2 do? Jul 5 2020, 04:59 PM
BeatNavy TS1 (ambient air temp sensor) has a minor enrichin... Jul 6 2020, 05:51 AM 914_teener Early models without TS2 sensors if the ECU sees n... Jul 6 2020, 09:51 AM
914_teener Double postr Jul 6 2020, 09:52 AM |
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