• The site migration is complete! Hopefully everything transferred properly from the multiple decades old software we were using before. If you notice any issues please let me know, thanks! Also, I'm still working on things like chatbox, etc so hopefully those will be working in the next week or two.

Vac leak, TB at Plenum.

98GPGT2D

98GPGT2D

New member
Hey guys, figured I would start a new thread on this one specific problem I discovered tonight. I am having a chuging or stumble on hot starts only, and got looking for Vac leaks tonight. I was inspecting the TB, and noticed that there is a small Gap between the TB and Plenum. Stethoscope confirmed my suspecion of a leak. I dont know if the previous owner had the TB off at one point in time and did not get it seated back on properly, or if the Plenum its self is actually warped.

What is between the plenum and TB for a gasket? is it a paper gasket or an o-ring? Much work to pull the TB?


Heres the pics I took with my BlackBerry.



FRONT SIDE
IMG-20110412-00104.jpg





BACK SIDE
IMG-20110412-00105.jpg





What are your thoughts?




Jay
 


I'd say the bracket from the side of the TB is likely missing. Usually people dont' have trouble once it's gone..but it's there from the factory and it's a pain to work around so most guys don't put it back on. It spans from down on the LIM to the TB by the TPS sensor.
 
The TB gasket is nylon/rubber. It fits into a groove built into the UIM. If the TB has been removed before and the gasket not changed then that is your issue.

Did you try sparying carb cleaner around the TB to see if it was an actual vac leak? The suction noise your stehoscope may be picking up could just be the normal sound of the intake sucking in air through the TB.
 
I picked up a TB gasket today from the Dealership...$24 bucks my cost. I would throw it on right now but the GF has the car in London right now. Wont get around to it till tomorrow night at the earliest. Im almost positive its leaking, but I will spray some carb cleaner in that area to see if it will confirm the leak.

Jay
 


Overall it's pretty common and usually a fresh gasket helps it.

Does your TB have a bracket to the LIM holding it up?
 
You must log in or register to reply here.
Back
Top