2G Throttle Body Sticking

[kyler021]

Hey all,

I recently rebuilt my throttle body with new shaft seals and a FIAV delete, and now my throttle plate seems to stick. Seems simple, but the weird thing is it only sticks when the engine is turned on. I can't get the throttle plate to stick when the car is off. It doesn't even feel hard to open/close. I'll get some resistance when the car is on around 5-10% throttle but it pushes past nicely after that. Another thing I noticed is that when I turn the car off while the throttle is sticking, I'll go to the engine bay to pull it back to it's resting position and it's already there. (I know this isn't a vacuum leak or anything of the sort because DSMlink will display the throttle position when I turn the engine off and it's greater than 0%.)

TPS and IAC were working normally prior to teardown. Throttle body blade is at the correct orientation, no gouges on throttle body surface.

Things I've tried:
Loosening throttle cable
Lubricating shaft seals and shaft with silicone dielectric grease
Throttle body shaft was wet sanded to remove the gray debris that was on it
Boost leak test at the throttle body showed no visible leaks

Is it possible that I tightened the nuts on the shaft too tight? I couldn't find torque specs anywhere so I just counted the threads on the pictures I had and set it to there. I'm not even sure what else to look for... Something around the FIAV maybe? Help me out guys!

Thanks!
Kyle

 

[1990TSIAWDTALON]

I have to disagree. The throttle blades need a good amount of tension. You absolutely have to have them wound correctly or you will have this issue.
As stated, don't tighten the shaft to much, but that's why I asked if it snapped back quickly. The springs are under more tension than you think.