Re: What and where is the throttle body? - Saab NG900 & OG9-3 Bulletin Board - Saabnet.com
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Re: What and where is the throttle body?
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Posted by BlaaSaab [Email] (more from BlaaSaab) on Wed, 10 Jun 2009 11:21:38 Share Post by Email
In Reply to: What and where is the throttle body?, Christian, Wed, 10 Jun 2009 10:47:03
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First of all, the throttle body houses the throttle (butterfly) valve that regulates airflow into the engine. It's actuated by the throttle cable connected to the accelerator pedal, but there are also a sensor and motor so the computer can make adjustments as it sees fit (e.g. controlling the idle speed). When you "step on the gas" you are really letting more air into the engine, which in turn causes more fuel to be injected.

To locate the throttle body, follow the black plastic air intake pipe that angles up and toward the back of the engine. The throttle body itself sits under the plastic "2.0 turbo" shroud that is clipped to the oil dipstick tube. If you carefully release these clips, you can lift off the shroud and see where the intake pipe clamps to the TB.

If you want to inspect/clean the TB, you'll need to loosen the hose clamp on the intake pipe and also loosen the bolt that secures the pipe to a bracket near the front of the engine. At that point there's enough flex to pop the intake pipe loose and move it to the side a bit.

More info about your issues would help, but based on my own rough starts (2001 9-3 base) I'm actually going to guess your problem lies elsewhere. It seems that most actual throttle body failures will put it into limp-home mode (do a search) and cause more than just a rough start. Not saying you shouldn't still check, but I found my TB was perfectly clean and was a new part made in 2007!

posted by 216.37.1...

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