C4 Tech/Performance L98 Corvette and LT1 Corvette Technical Info, Internal Engine, External Engine

Sensor question

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Old Oct 11, 2011 | 05:12 PM
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Default Sensor question

Can someone tell me what are the two sensors in the front of the intake manifold? One has like a fuel injector plug on it, and the other has a two wire plug. Thank you, Joe
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Old Oct 11, 2011 | 06:41 PM
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Default sensors

The following link identifies C4 sensors and locations:

http://www.corvettephotographs.com/c...nformation.htm
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Old Oct 12, 2011 | 02:21 AM
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Originally Posted by jadedvette
Can someone tell me what are the two sensors in the front of the intake manifold? One has like a fuel injector plug on it, and the other has a two wire plug.
2 wire sensor circled is the Coolant Temp Sensor for the ECM.
Brass unit to the left ( with inj plug ) is the cold start switch to operate the cold start injector used on 85 -88 TPI


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Old Oct 12, 2011 | 03:34 AM
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One is the CTS - Coolant Temperature Sensor. It connects to the ECM.

The other is the cold start switch (the one with the fuel injector looking connector). It turns on the cold start injector while the engine is cranking. It's a thermostatic switch and opens after 8 seconds of cranking or when the coolant is hot.
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Old Oct 12, 2011 | 06:27 AM
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Thank you, I thought the one had something to do with the cold start but didn't know what. Joe
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Old Mar 12, 2012 | 02:04 PM
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Old Mar 12, 2012 | 06:51 PM
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Originally Posted by myfunz
Why?

Post is three months old and the question has been answered
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