Under the throttle body cover?

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Jul 31, 2004 | 06:10 PM

DougSilver

Thread Starter

Burning Brakes

Joined: Feb 1999

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From: Encino CA

Under the throttle body cover?

I just replaced the black cover on the top of my throttle body with a nicer one. But I cannot figure out the function of the cover. When removing it, the only thing I see below is maybe one opening (is this related to the IAC). Otherwise, the space below the cover was fairly clean except for what looked like a bit of gum or varnish. So why not just have a casting with an integrated cover?

Jul 31, 2004 | 06:47 PM

Wheelman

Le Mans Master

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From: Less Talk, More WOT | Houston TX

Quote:

Originally Posted by DougSilver

I was wondering this as well. As far as I can tell it is just part of the casting. My car came with a throttle body airfoil and the other end of it was inside this hole (actually still is, because i tried to remove it but the screw was jammed in there

Jul 31, 2004 | 09:48 PM

pettvette

Safety Car

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From: TN PA

CI 5-6-7-8-9-10-11 Vet

I'am pretty sure GM made it that way so you can install your Air Foil

Aug 1, 2004 | 12:30 AM

Jet-Jock

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From: Lake Mary Florida

That's the clean air port.

Aug 1, 2004 | 12:33 AM

*89x2*

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From: ...tearing up the highways, one state at a time™®©

Quote:

Originally Posted by pettvette

I'am pretty sure GM made it that way so you can install your Air Foil

...wouldn't that be a conspiracy

Aug 1, 2004 | 02:05 AM

DougSilver

Thread Starter

Burning Brakes

Joined: Feb 1999

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From: Encino CA

Quote:

Originally Posted by 93JetJocky

That's the clean air port.

The clean air port for what? Where is the air going? It looks like there is just the one opening under the cover so the air can't be going anywhere.

Aug 2, 2004 | 03:16 PM

DougSilver

Thread Starter

Burning Brakes

Joined: Feb 1999

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From: Encino CA

Had a thought--sound possible?

After thinking about it for a while more (too much time on my hands), I wonder if it is possible that there was originally some device planned for the throttle body that would allow for an alternate path for air to enter the idle circuit (e.g., heater air coming off the exhaust or somewhere for cold climates). Perhaps this piece of the throttle body included some pipe or duct and the piece screwed onto the spot where there is now a cover. However, somewhere along the design it was decided this was not needed, hence the cover. Any thoughts? Anybody care?

Aug 2, 2004 | 06:00 PM

Jet-Jock

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From: Lake Mary Florida

I don't know. I'm not an expert on the throttle body, I just am aware of what that is called. Clean air plate.

On the J engine, it is called the coolant cover. It appears that coolant flows through there on that model throttle body.

Sorry I can't help any more than that.