Fluid in intake

[edhand]

I was changing my throttle body on my '92 today, and when I had the old on off, I looked in the intake, and noticed a puddle in the back corner near the vacuum tree. It's either oil of ATF (I suspect tranny fluid because it's very low). I figure it's being sucked in through a vacuum line. Any idea how I could figure out where it's coming from? I was going to check the vacuum modulator, but I can't find the damn thing! Any help would be appreciated.

 

[Glacier991]

the vacuum modulator is on the passenger side near the back of the heat shield, and just under the back end of it. pull the tube and see if there is fluid present, if so, replace it... easier said than done.... tight quarters.