I have a 92 civic vx i just put a 98 gsr in and when im idiling the the car just surges from 1000 up to 1500 back to 1000 then back to 1500 then back to 1000 it just keeps doing this, what could this be caused from or how do i fix this ? thanx

 

vaccum leak somewhere??

dirty IACV??

I'd start there.... I'm guessing you're not throwing any CELs...

 

TURN OFF THE CAPS LOCK!
did you properly bleed the coolant?
chris

 

my car does the exact same thing, i'm goin to try and adjust the idle maybe to around 1000. i think in my case it has a real low idle and the computer keeps pushin it back up. i'll try it and tell you.

 

thanks for the ideas i will try all those suggestions this weekend after the v day cause on saturday im out to dinner , then poppin vtec all the way to the motel ..........thanks again

 

Yea sounds like your idle is pretty off.