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View Full Version : IACV RB25? Lean or Rich?


I.<3.MY.SILVIA
08-24-2012, 03:32 PM
My IACV on my RB25 isn't hooked up to any vacuum. It is currently open and just sucks in air. I was wondering if that would cause my motor to run lean or rich. I have a wideband but haven't hooked it up yet. Just want to know if it's safe to run the car while my IACV is open.

bkt808
08-24-2012, 04:47 PM
it will probably throw it off because right now the air being sucked in is not metered by the maf, on my setup i have a 3/4in nipple right before the throttlebody on the IC piping that its hooked to

I.<3.MY.SILVIA
08-24-2012, 06:48 PM
Does it mess with performance?

bkt808
08-24-2012, 07:37 PM
it might just effect your idle, not sure if it will effect performance through out the rpm range

I.<3.MY.SILVIA
08-25-2012, 10:33 AM
it will probably throw it off because right now the air being sucked in is not metered by the maf, on my setup i have a 3/4in nipple right before the throttlebody on the IC piping that its hooked to

I'll try this one out. Thanks man!