So i ported my plenum (i think correctly) i ground away the walls right in front of the 2 EGR holes in the front of the plenum. and now the car idles at about 1k rpm, and when i first start it up it idles at 2k for a few seconds.also there is a large air suckion noise when the car is running.the car is a 1990 formula 350

 

You have a vacuum leak. Check all your vacuum hoses and the like.

 

sounds like you have a leak, vacuum and or where the gaskets meet the runners, did you line up the bolts correctly and tighten them enough?

 

ok thanks guys thats what i thought. i was kinda not looking forward to that but i feel teh same way. i also had teh teh entire intake off at the sametime as i was changing out lifters (not fun w/aftermarket stuff)getting fuel rails and everything else in,.project and a 1/2.since got a three day weekend looks like i know what i'll be doing.thanks again for advice

 

Do you have any pics of this, I was thinking of doing this myself!

 

Actually I found the same thing when I ground down the walls behind the throttle blades, the noise level increased from the intake.
Very easy to hear without an airbox or tubing (just had the crappy TB filter)
Makes it sound like its really moving some air!