Quote:
Originally Posted by ultimateirving
Ok if the bov is opening at idle and decel thats kinda a problem, if its adjustable tighten the spring a little it shouldnt be popping open unless your getting into boost.
Next the IACV is designed to catch the Rpm's on decel to keep it from stalling, It sounds like yours may be malfunctioning. Try cleaning it first, Remove it to clean and make sure you check the gasket before you replace it. Then search online how to set idle in SR20 because it is set thru the iacv
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i agree with this about the Idle air control valve. But not all BOV's idle in the closed position. Off brand junk is notorious for this. Its a big thought when deciding what BOV to put in your car. HKS has a second diaphragm so you cant build enough vacuum to pull it open at idle. Thats also why HKS needs to run those little air filters.