I just did a mini me swap on my crx and my idle is very high. <3k rpm>
info: 90 si crx,y8 head,d16a6 block,stock ecu,.stock intake manifold
I did not touch the intake manifold besides un bolting and new gasket.
The coolant has no bubbles .
the iacv is not dirty.
I have sprayed for vacuum leaks.
and the throttle cable was not moved in the process.
The idle stays at around 3k after it rises first to 3500 rpm. please help me .

 

check the FITV

 

done cleaned thanks

 

when it warms up does it return to normal idle???????

 

no sorry

 

coolant thang didnt work?

 

naw

 

The timing is perfect though.Lots of posts say its the iacv or fitv .It was just working fine the other day when I drove it .Should I play with the screw?or undo the positive cable .I dunno help please

 

I know you said you checked vaccum but them things can be sneaky......

 

You are right sir. the middle intake manifold gasket bolt was very loose.That was the problem .thanks for making me think!