Idle air control valve?

[fabio240]

Does anyone know what is a direct replacement to the idle air control valve? But Im not sure thats what it is the mods on the car right now is (z32 maf, walbro 255 pump, fuel pressure regulator, fmic, exhaust, stock injectors, afc neo, and some more bits and pieces.) The car idles fine when in limp mode via unplugging the maf and as soon as I plug in the maf the car dies but is still driveable if I keep the rpms above 1k. There are no boost leaks at all and the compression is fine. So when I unplugged the IACV valve and the AAC valve the car is easier to keep from dying out I dont know wtf is goin on maybe someone can help or knows what the hell is going on.

[float_6969]

You've either got a bad MAFS or a leak somewhere in the piping you're missing. It's not the IACV.

[fabio240]

But the mafs is a remanufactured unit do you really think it could be that and also i noticed that when I go WOT the car just falls flat on its face like there is no response at all but if I dont floor it I can drive it im leaning towards a gigantic boost leak that I cant find I sprayed carb cleaner around the inake manifold to see if there was a boost leak but nothing happened Im completely confused?

[progman]

Check your plugs to make sure you plunged everything in right. There are a few plugs near the iac valve that are very easy to mix up.

[fabio240]

Everything is plugged up Im sarting to think its my wiring but I cant do anything until tomorro cuz the car is in md but I live in va but Im open to all suggestions if anyone else has had these problems and how did they fix it something I just need more ideas cuz im getting really frustrated with the car but now I have another problem cuz when I floor it the car seems to just fall flat that is also another problem that im experiencing.

[tinkbz]

i know how you feel and im also looking for the same fix, i dont have turbo, but my 92 240 is doing the same thing, i got another MAS for it and it still do the same thing, im stumped, im also in VA so when we get our cars running good maybe we can meet up round here somewhere and do some trading or just riding.

[float_6969]

Block off the brake booster. Sometimes the diaphragm in there gets a leak in it and it's real hard to find.

Also, if you have BOV's you've installed, make sure they're adjusted properly.

[DALAZ_68]

bringing this back from the dead since mine is giving me issues...

right now im not picking up signal on my IACV... so my engine idles around 2k...runs fine...but i could adjust to make it idle lower id be happy...any thoughts on rebuilding? or replacement?

[float_6969]

You can adjust the idle/throttle stop to adjust the idle if you want. It's been a long time, but I think the IACV from the SR20 Sentra SE-R's will work if you can't get one for a Pulsar SE.

[TheMAN]

I thought there was an idle adjustment screw at the side of the throttle body instead of needing to mess with the throttle stopper screw (last resort)?

[float_6969]

There is an idle adjustment screw on the thing the idle valve bolts to on the side of the plenum, but IDK if it will turn the idle down that far.

[DALAZ_68]

it wont actually...wont go that low... i know the plugs on the IACV are slightly corroded and its not picking up signal...i figure replacing it would help...?

[TheMAN]

you could always try to clean it