Okay after swapping my gsr motor into my si and getting it started it idles at 1 and a half idk if this has 2 do wit the manifold cuz i deleted the butterfly intake manifold wit a Skunk2 intake mani i have a check engine light but my snap on diagnostic tool wont doesnt give me any codes do u guys have any idea wat it may b?

 

I had a problem it would idle at 1 and half also!

Check:
1.Vaccum Leaks
2.Try to check if your senors are pluged in!
3. Try to do a Idle Troubleshooter Test

But in the end my problem was that my senor (IAV) was messed up

 

when it starts it idles at 1.5k rpm is normal warming up.... well if you are saying it idles at 1.5k rpm is warmed up then its bad

 

does it idle at 1.5 rpm as in just sits there when ticking over

 

that's normal with the SK2 mani man I have the same a gsr motor with the SK2 mani and was told b4 I got it fiited it will idle higher around 1.5 rpm

 

Check your fitv on the bottom of your throttle body, that's what was wrong with my gsr swap.... And mine also idles at 1500rpm with a skunk2 Intake mani.....

 

weird ive never had that problem with the skunk2 mani and ive installed it a handle of times in different cars.
check all your hoses make sure they arent cracked.

what tb are you using?

 

I am using the stock gsr throttle body and yeah every start it idles at 1.5 rpm and after a race itll sit idling at 2

 

dang thats weird, take a bottle of brake cleaner and spray it between the tb and manifold, maybe theres a gap where air escapes, also try it were the mani meets the head. if idle goes down while spraying the brake cleaner you will need a new gasket.

 

what kind of car is it?
and did you bleed the cooling system for air?
i like using this tool
http://www.amazon.com/Lisle-24610-Sp...0880114&sr=8-1