ok, we have a 97 gsr, just put on a different stock head and a skunk2 manifold

the car idles at 4K and kinda surges

if you hold your hand over the TB it will idle down to like 2K
and iv'e noticed from pictures of the skunk2 TB that it has a smaller hole to let in less air at idle (i guess due to the manifold not having secondaries)
would this be part of the problem, should i just get a skunk2 TB and see if that helps

anybody on here used a skunk2 manifold on a gsr

 

I would look for a vacuum leak somewhere. Too be idling at 4K, there must be an open vacuum port or something. What t/b are you using?

 

spray some strater fluid and if you have a leek at will rev up!!!

 

well i was using the TB that came with the head we bought
but i guess it had a fast idle valve on it

put back on the stock TB that did not have one
and the car runs fine