Codes

Zat_Zuma

I have had the air tube intake rubber connector on the throttle bodies be loose and mis-aligned, causing a air leak into the manifold. I'd check there first before looking at the manifold connections.

I just hope you don't have a cracked manifold

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[B]2009 & 2017 370Z Touring Sport Autos SOLD

wstar

Yeah that would cause a vacuum leak as well. I believe he's talking about the tiny EVAP hose connections, one on the rear of each throttle body. Double-check PCV connections too (two tubes going to the front little inlets of the manifold).

A good way to check for vacuum leaks in general that I've seen posted elsewhere on this board: with the car running, spray something with a relatively safe solvent and/or fuel mix all around the intake manifold area (e.g. brake cleaner made from acetone/methanol/etc. Or maybe a safer solution would be a spray can of Engine Starting Fluid). If there's a vacuum leak, it will suck that stuff in and combust it, and you'll hear a change in the car's idle speed or whatever. Be careful of the fire hazard spraying that stuff around hot metal though.

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