Yes normal
Stock throttle body operation?
Thread Starter
Instructor
Joined: May 2004
Posts: 160
Likes: 0
From: Dallas TX
Stock throttle body operation?
I have a 99 FRC.
Put an LS6 intake mani on and was cleaning everything and noticed the throttle body, at rest, is not actually fully closed.
I can push the blade in so that it is fully closed and you can see where there's an dirty oil line of where the blade opens and closes.
Is this normal or outta adjustment? Can you adjust the blade position on a throttle body?
But...I am assuming with the motor running at idle there's a vacuum and really...the blade then fully closes....
Just wanted to ask to make sure, thanks!
Put an LS6 intake mani on and was cleaning everything and noticed the throttle body, at rest, is not actually fully closed.
I can push the blade in so that it is fully closed and you can see where there's an dirty oil line of where the blade opens and closes.
Is this normal or outta adjustment? Can you adjust the blade position on a throttle body?
But...I am assuming with the motor running at idle there's a vacuum and really...the blade then fully closes....
Just wanted to ask to make sure, thanks!
Team Owner
Joined: Mar 1999
Posts: 22,025
Likes: 192
From: At the beach in little Rhody
Normal.
As explained to me by Mark Shaner when you turn the key the PCM closes the blade then opens it to a fixed angle for cold start. I believe that sequence also establishes the initial zero position for the throttle position sensor.
As explained to me by Mark Shaner when you turn the key the PCM closes the blade then opens it to a fixed angle for cold start. I believe that sequence also establishes the initial zero position for the throttle position sensor.
Thread Starter
Instructor
Joined: May 2004
Posts: 160
Likes: 0
From: Dallas TX
Wonderful, great responses, I love this forum, makes total sense!
Oh yea and I am also installing my Blackwing and Elite Engineering PCV catch can, too.
I gotta keep this new LS6 intake mani clean! ;-)
Oh yea and I am also installing my Blackwing and Elite Engineering PCV catch can, too.
I gotta keep this new LS6 intake mani clean! ;-)
Instructor
Joined: Aug 2003
Posts: 220
Likes: 8
From: A little place called Macungie PA
Does it hurt the Throttle body if you move it by hand. In other words if I move it to check for dirt will my car be okay, or do I need to do something special so it goes back to where it was?
Thanks
Thanks
Tech Contributor
Joined: Dec 1999
Posts: 32,910
Likes: 2,402
From: Anthony TX
CI 6,7,8,9,11 Vet
St. Jude Donor '08
No,,,NOT AT ALL!! I push mine open and clean the underside of the blace and the TB housing. Just let it go once your done and it will flop back in place. It will NOT shut tight. Like vettenuts stated, the PCM determines the correct opening upon initial key on.
BC
BC
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