Like George said below, make sure you get a new 'O' ring (don't reuse the old, its deformed). You can hold it in place with some petroleum jelly so it stays in place while assembling. IF after you run it a couple of cycles (so the car learns the new TB) it still hesitates/stumbles/runs rough, you just might have lost the groove /'O' ring alignment while assembly. It is usually where the vac leak is. That is why it is so very important to make sure it stays in place while assembling the TB to the intake. Good luck, you'll LOVE to peppier response.


Right on George, a new 'O' ring is a MUST!

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