what are you talking about when you say you drilled a hole where the iac is. I am haveing the same problem with a buddys car and he has already drilled holes in blades and the iac count is still 160 maxed out and it wont idle.

 

i didnt drill through the blades at all.... there is a little hole on the bottom of the throttle body if your looking at it frontwards and looking at the blades... on the stock TB there is a hole drilled straight through in there to allow some airflow... on the aftermarket peices there is no hole... so i drilled that hole in there... just start small and work your way up untill your counts come down... get what im saying?

 

I gotta see a pic of this. Please take some

 

gonna be a few days... cause its raining today and then tomm night i have training fo rwork.. but thursday night ill probably work on it for a little

 

yes im havin the same problem too, idles fine till i drive it then when i stop it dies, replaced the maf sensor, iacv sensor, and tbi sensor and is stilll doin it

 

I would like to see a pic of this

 

http://members.***.net/chipsbyal/page/idle/index.html



http://www.hashmarks.com/techtips/throttle_body_mod.htm

just start small, you will probably work you way up to or very close to 1/8" but i would start at least 5 steps below that. it helps if you have a scanner and can check after each drill pass. make sure you clean those shavings! check the iac count in closed loop too.


for those who cracked the blades, i would ensure you are seeing correct voltage on the tps signal wire with the blades fully open. would suck if you aren't getting full throttle!

 

Interesting. I had thought about how the IAC would compensate for the increased displacement. My tune said to just crack the blades but this seems to make more sens since thats it's job. Cool I will be reading up on this a bit more.

 

yeah if you look at your stock throttle body next to a 58mm aftermarket one, you'll see right away whats up.