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

1993 Corvette throttle body

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Old Jun 18, 2022 | 06:29 PM
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Default 1993 Corvette throttle body





Hello everyone
First time on this forum and and first time Corvette.
I just bought a 1993 Corvette and just noticed two tubes under the throttle body. Im pretty sure a hose should be attached to these. Please see pictures. Can anyone tell me what they are for? Im looking at diagrams but I’m having trouble identifying.
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Old Jun 18, 2022 | 07:27 PM
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Wait for a moderator to move this thread to the C4 forum.
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Old Jun 18, 2022 | 07:39 PM
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Moved to C4 Tech.
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Old Jun 18, 2022 | 09:55 PM
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That’s the throttle body coolant line. It is a common mod to eliminate.

Primary reason is to eliminate a potential source of coolant leak onto the Opti, the other is it is seen as a very very very slight performance mod (by not heating the air coming through the throttle body).

Nothing to worry about and only helpful in very cold weather driving (to warm things up faster by heating the air going through the throttle body).

Oh and you better tell us more about this new purchase and post pics!!!

Last edited by pedricd; Jun 19, 2022 at 09:12 AM.
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Old Jun 18, 2022 | 10:31 PM
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welcome
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Old Jun 19, 2022 | 08:53 AM
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Like pedrict say don’t worry about that it’s kind of useless I’ve done that mod on my 93 too
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Old Jun 19, 2022 | 09:28 AM
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Welcome to forum ! I have a 93 that i bought new.. We can help you this forum is great!
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Old Jun 20, 2022 | 10:51 AM
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Originally Posted by pedricd
That’s the throttle body coolant line. It is a common mod to eliminate.

Primary reason is to eliminate a potential source of coolant leak onto the Opti, the other is it is seen as a very very very slight performance mod (by not heating the air coming through the throttle body).

Nothing to worry about and only helpful in very cold weather driving (to warm things up faster by heating the air going through the throttle body).

Oh and you better tell us more about this new purchase and post pics!!!
Exactly right
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