Thank you for all the help and input guys. I tightened everything evenly and did follow the criss-cross pattern on the bolts when I did it the first time. The intake gasket stayed on too.
Today I tried some throttle body and intake cleaner from pepboy's, opened everything up and put it back together, followed the criss-cross pattern on the bolts tightened then evenly. Sprayed the TB cleaner as directed and it seams like the idle is smoother now. There is still a slight hesitation(when I give it gas)  though. Have to drive it around and see how it behaves.

On a completely different note, now that I have the TSX IM and TSX TB, how about some TSX throttle body spacers guys?
Here is the linkhttp://www.corsportusa.com/store/catalog/product_info.php?products_id=1965
lemme know what you guys think.

Thank you for all the help guys.

I disconnected my battery and let it sit for some time(10 mins) and then reconnected it. But its still has the erratic idle.

I checked all the hoses and they seem fine, and the bolts are perfectly tight.

What am I missing here...?

Hmmm, I would go back and check to make sure that when you forced the intake tube back on, the tube didn't split open from the larger TB.

Also, when you put the IM on, did you torque the bolts to 16ftlbs, and do them in the correct pattern?

We're trying to cross out all of the simple stuff so that it'll be easier to figure out the real problem.

I checked the intake tubing and it looks good, I dint torque the bolts, I put them back as tight as I could. How do I measure the torque on them? I didn't follow the pattern either, . Did I mess it up?

How to check for cracks in the hose?

I have to go through the manuals to see if I have the radio code in there, before I take out the battery terminal.

I am very iffy to open it up again, cos I had to force the 60mm air intake tube on to my 64mm TB  . It was a tight fit. 

I did put the vacuum hose (from the front on the accord IM) to the back of the TSX IM.

This is a great thread,
finally did my TSX IM and TB install today, But I have a problem now.
its has a very rough idle and very erratic, some times it feels like the engine is dying and then it picks up high.



This is what its doing:

original

Install was easy except for two things.
1. The bolt under the IM was really hard to get to, and I didn't have the right tools.(paid the local mechanic guy $5 to get it out).
2. The TSX TB was too big for my OEM intake piping, TB is 64mm and the piping was only 60mm so had to force it in,and the clamp that holds the intake tube to the TB didn't fit  .

Can somebody tell me what did wrong?

I bought an TSX IM and TB, tried to install it today but had problem getting to bolt under the manifold out.  

So had to put it all back together. Can somebody advice me the easiest way to get the bolt out?

Thanks for updating the pics Timot_One

I wanna do this mod, but your pics are down .

Is there a way you can correct the links...?