1jz iac question

wornoutsupra

i gots a poopra
Jan 23, 2010
808
0
0
canton,ohio
Ok so I decided to go single, and I know that the iac was hooked up to the stock twins. My question is where do I hook the iac valve upto now that I dont have the twins on my engine.
 

wornoutsupra

i gots a poopra
Jan 23, 2010
808
0
0
canton,ohio
ok, well right now I dont have it hooked to anything. It is idling around 2k, if I put a breather on there, will it bring it back down to normal idle around 800?
 

supra1008

Active Member
May 2, 2007
1,179
0
36
Philadelphia
not necessarily. you might have a vacuum leak or something else. Plus putting a breather filter on it is just going to prevent dirt getting into your intake manifold/engine.
 

Albert

Custom CT26, CT12a, CT20 upgrades
May 13, 2009
1,710
0
0
Tempe, AZ
Block it off. crack your throttle body open. or reroute it into the inlet. If you put a filter on it, it WILL cause a vacuum leak(causing it to idle at 2k). My buddy put on a rubber block off then drilled a hole in it, giving it a slight leak to idle at 1k

Mine idles at 800 blocked off with a aluminum plate I made. I just cracked the TB enough to cause a leak. Now that Proefi can Control it, I put it back on, to route back into the inlet, so I can tune cold starts etc