Idle drops when I come to a stop

[jdm213]

Ok so everytime I drive and shift to neutral the rpms drop to like 400 sometimes 0 and then picks back up slowly or it stalls my idle is set to 850 rpms .. things I have done clean my maf and replaced it with another one it does the same thing replaced my intercooler kit and did a boost leak test , change my bov to greddy fv one and tightened it up , checked my fpr and it’s at 36 psi at idle. I also have a new fuel pump other than that the car pulls fine it’s just when it comes to a slow stop idk what to do

[cbeuglas]

It is because your BOV is not recirculated. Common problem. Do some searching for remedies. A super- AFC can help tune this out.

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[jdm213]

It is because your BOV is not recirculated. Common problem. Do some searching for remedies. A super- AFC can help tune this out.

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Fyi it has always been recirculated and I’ve also had this problem even when I had my stock side mount

[kyral]

im guessing an SR?
have you tried adjusting the idle?
does it do this only when its warm?
and 36 psi is a bit low for the fuel pressure but I don't think that's your problem (unless u set it that low with an adjustable fpr)

[KAT-PWR]

idle control valve

[mr.nismo.]

Well if you're recirculated (I'm assuming properly between maf and turbo) then it's down to the aacv as kat-pwr said. Take it off and brake clean out the carbon deposits it most likely has in there. Also... How's your recirculation setup on the intake? Stock boot? Aluminum pipe?

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[dreizm728]

I actually read something a while back I remember reading something about checking your fuel pressure it’s supposed to be at around 43 psi idk if that would help

[TheRealSy90]

Set fuel pressure to 43 psi.
Take off the iacv, and completely disassemble it, clean out all the crap that builds up inside it.
Make sure the throttle plate is fully closed at 0 throttle.
Verify TPS voltage is proper at 0 throttle.
Set the iacv fairly open, let the engine warm up and set the desired idle.
Double check ignition/CAS timing is 15 btdc.

[nissansrdub]

I had the MAF ground wired to chassi ground. (Z32 MAF)

Wired it to the ecu like your supposed to and fixed that right away. How’s your MAF wired?

My bov has always been recirculated too

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