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It's attached to the back of the intake dealy between the manifold and the engine block and yes, it points up and back. I have no idling issues with my car, but I do have an annoying hesitation on acceleration around 1500 RPM, which I'm attributing to the TPS right now.
If that thing is open on your car it would be allowing air to be drawn in which isn't being recognised by the MAF, so you'd be running leaner than you should be. That hole is too small to allow much air through, so at high RPM there would be little difference, but at idle there might be enough airflow through there to screw up you air/fuel mix to the point it makes you car run poorly.
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Chris
92 Ebony Mica LS-L " A Rolling Restoration": 223,250 KM - Sleeping
2007 STi 6MT, Stance GR+ coilovers, PWR Rad, JDM hood badge, svxfiles 6000K HIDs, JDM Clear Corners, $15/15 min mod, $20/20 min mod, Energy Swaybar Bushings, Hella Supertones horns, Gold STi BBS rims, Group A lightweight crank pulley, A/C system removed, Custom header-back exhaust, Hybrid carbon/metal rear sway bar, restored headlights with CCFL halos
2008 Subaru Legacy Spec B - Diamond Grey Metallic - Sold
2020 Ram 1500 Longhorn - Red Pearl
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