2.7l Engine “residue” question

[Alvin Olson]

I noticed a stain or oxidation on The top of what i assume is the throttle body inlet. I could just clean it, but curious what it might be.
~ 1500 miles.

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[DoubleADuster]

I have the same thing I’m at 8500 miles

 

[VVSidewinderVv]

Did you try tasting it?


In all seriousness my guess would just be dirt/ mud. Unless it's greasy I wouldn't worry too much. Might be worth pulling that MAP sensor to make sure it's not caked in it if it is greasy.

 

[Alvin Olson]

Did you try tasting it?


In all seriousness my guess would just be dirt/ mud. Unless it's greasy I wouldn't worry too much. Might be worth pulling that MAP sensor to make sure it's not caked in it if it is greasy.

I’ll pull the MAP and check. My guess is some sorta condensation.

 

[VVSidewinderVv]

I’ll pull the MAP and check. My guess is some sorta condensation.

The other possibility is water mixed with oil leaking through the clamped connection right there. It's right downstream of the PCV system. I'd make sure that connection is tight.

 

[Alvin Olson]

Looks like it was coming from the throttle body or at least leaking from there.

I cleaned it best as i could as it was very dry and crusty. Not oil. Most likely condensation leaking from that clamp.
I had to use MAP cleaner and steel wool to remove it then some rubber restore to make it look nice again.
i then moved the clamp a bit closer to the edge and tightened it within reason.
i will keep an eye on if it returns.

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