300zx aac valve. 3L ENGINE<199808 - 199904> KA24DE 2. As far as testing it thats unnesssiary becuase I have not seen on fail. Auxiliary Air Controller (AAC) Fast Idle Control Device (FICD) Air Regulator The AAC and FICD are both solenoids that help make up the Idle Air Control Valve (IACV). 3L ENGINE<200007 - 200107> VG33E 3. The brass screw can tighten or loosen the spring that shuts aac valve. You will have to remove epoxy off brass screw to remove it. 4L ENGINE + VG33E 3. But just hook it up to the battery and make sure the valve moves all the way open. I have a UK TT and recently fitted an AAC Valve from an import (due to a high idle problem), the import AAC Valve is different from a UK one, could this be the reason for the AAC valve been blown, as it has now stopped working and has high idle again!!! It only worked for a couple of days and sou Idle Air Control Valve (IACV) Air Regulator Auxillary Air Control Unit (AAC) gasket for Nissan Z32 300zx. The IAA controls the idle speed of the engine based on the signal it receives from the car's central computer, the Electronic Control Unit (ECU). Be careful not to damage threads and slot for screwdriver. I have been on several Zpart sites and they all seem to be a bit confused on this part. Z1 also sells this connector pre wired as a pigtail to splice in to your existing harness HERE. The AAC (Auxiliary Air Control) valve is controlled by the ECU (PWM-control) to set the idle speed to a pre-programmed level. A. valve. The ECU actuates the AAC valve by an ON/OFF pulse. i can never remember which is the AAC but the valve on the drivers side of the plenum is your idle control valve, and the passenger side is a cold start valve to let in more air. (some years dont have this large brass screw). hi peeps, looking for some help on adjusting my idle as its a tad high, my tps is bang on set at 0. . May 18, 2007 · The AAC valve (upper larger round one) is controlled by the ECU and continually modulates the valve to control base idle. The IACV also contains an adjustment screw for setting the base idle. 74 delivery Sponsored 90-96 Nissan 300zx Z32 Idle Air Control Valve IACV AAC OEM Vg30 Regulator NA TT $170. Once you take off and it warms up all is fine. Find many great new & used options and get the best deals for 84-89 Nissan 300ZX VG30ET Idle Air Control AAC Unit Valve aac82-02 at the best online prices at eBay! Free shipping for many products! $178. )Auxiliary Air Control Valve is attached to the right side of the intake Manifold. so I am thinking its the AAC valve. At first glance everything looked okay. Z32 Idle air control valve (IAA / IACV) found on the rear drivers side of the intake plenum on all 1990+ Nissan 300ZX models. Also, there is no ticking when cold started in the morning and the idle is high. My question is: Is there a specific or detailed cleaning procedure once you remove it? Like disassembly etc. How do i adjust the idle speed as it ticks over at 1500 is there a screw somewhere?thanks. U. All fit 1984-1996 Nissan 300ZX and more. The (A. It is designed to ensure optimal performance and compatibility with your vehicle. valve by an ON/OFF pulse. The IAA controls idle and compensates for cold engine starts and pressure changes. My question is, although they are different, can I fit the newer o Edit: I put a screwdriver up to the AAC valve and it is where the ticking sounds most prominent. It wasn't until I compared them side by side that I noticed some subtle differences. com. Anything else I should check? My 88 Turbo runs rough and sometimes dies when at cold idle. These will start to fail and stick open and closed. cheers davie Auxiliary Air Control (AAC) Valve: Description and Operation General System Information Idle Speed Control System CIRCUIT OPERATION The idle speed is controlled by the amount of air that is allowed to bypass the throttle plate through the auxiliary air control (AAC) valve. Common Problems: Troubleshooting: To test do the following: Sources used on this page: 1984-1988 Nissan 300ZX Factory Service Manual You will likely find that the aac valve is clogged with carbon mud. These hoses are 4 ply reinforced high quality silicone hoses and are custom formed for perfect fitment on the Z32. Once you have cleaned and lubed the AAC/IACV valve assembly the most reliable test is a direct 12V hit. actuates the A. Cleaning the Idle Air Control Valve (IACV)/Auxillary Air Control valve (AAC) is easy once it out. Plugged in the Code Reader and popped up code "P0505" relating to the AAC or Idle Air Control Valve I was wondering if any parts from the Infiniti J30 can fit the 300zx? I heard they share same engine and transmission? I found an AAC from the infiniti and seems the same except from the "T" shape tubes where the air goes into the actual valve. My IACV hose split completely, and I've been completely unable to find one, despite 6 different cars in 3 different junkyards This Coolant Temperature Sensor / AAC Valve Repair Harness replaces the faulty connection on the AAC Valve of your Idle Air Control Valve or the Coolant Temperature Sensor. ? or do you just squirt some type of cleaner in it and let it drain out and dry? We stock these Idle Control Valve brands for the Nissan 300ZX: andells Idle Control valves available for the following Nissan 300ZX years: 96, 95, 94, 93, 92, 91, 90, 89, 88, 87, 86, 85, 84, 1996, 1995, 1994, 1993, 1992, 1991, 1990, 1989, 1988, 1987, 1986, 1985, 1984. People who viewed this item also viewed 90-96 Nissan 300zx Z32 Idle Air Control Valve IACV AAC OEM Vg30 Regulator NA TT $184. The IACV(Idle Air Control Valve) maintains a perfect idle, and lets you adjust as required. C. The AAC housing receives air from the pipe connecting to the driver's side accordion pipe, and/or from the balance tube, through the air regulator. Does this problem sound like a clogged AAC?? The car starts and idles fine, this problem just pops up out of the blue, usually when the car is warm. Free delivery to Australia. Usually causing Shop wholesale-priced OEM Nissan 300ZX Idle Control Valves at NissanPartsDeal. 99 Free shipping CZP Molded Silicone Hoses are a direct replacement for stock OEM hoses: # 4 Ply Silicone # Perfect Fitment # 4. This Coolant Temperature Sensor / AAC Valve Repair Harness replaces the faulty connection on the AAC Valve of your Idle Air Control Valve or the Coolant Temperature Sensor. The other is the earth trigger which the ECU provides as required. (easily comes off carb cleaner). 99 + $7. Jan 19, 2026 · Find many great new & used options and get the best deals for NISSAN Genuine 300ZX Z32 Aac Valve Iacv Assy 23781-40P10 NEW at the best online prices at eBay! Free shipping for many products! This Coolant Temperature Sensor / AAC Valve Repair Harness replaces the faulty connection on the AAC Valve of your Idle Air Control Valve or the Coolant Temperature Sensor. 3L ENGINE<199909 - 200007> VG33E 3. The actual part you are referring to (with the wiring connector at 90 degree angle is the AAC valve. *WARNING* - Do this modification at your own risk. 00 Free delivery 90-96 Nissan 300zx Z32 Idle Air Control Valve IACV AAC OEM Vg30 Regulator NA TT Has anyone ever successfully cleaned out all parts of the AAC valve only i need to check it this weekend and want to see how difficult is to get off. 300ZX (Z31) Forums - IACV/AR delete, idle control help! - Howdy ya'll. Tutorial for dissasembling the IACV and attached AAC for your Z32 VG30DE or VG30DETT. The longer the ON duty is left on, the larger the amount of air that will flow through the AAC valve. 48v and i know where the idle adjustment screw is but what is the exact idle supposed to be and is there any particular sequence of adjustment. Find many great new & used options and get the best deals for Z32 Nissan 300zx Idle Air Control Valve IACV IAC AAC Regulator 23781 40p10 at the best online prices at eBay! Free shipping for many products! 84 300zx z31 5 speed turbo Got it with EGR and FICD/AAC assembly removed, also a breather filter on the port on the valve cover on the driver side front of the engine, several vacuum ports blocked off Basically, what is the PROPER way to delete the EGR and FICD/AAC? 300ZX (Z32) Performance / Technical - IACV or AAC (or both) 93 z32 - Recently was told be the dealer that my AAC Valve was defective and needed replacing. Z1 also sells this connector and the components to build your own repair harness HERE. Get the wholesale-priced Genuine OEM Nissan Idle Control Valve for 1985 Nissan 300ZX at NissanPartsDeal Up to 35% off MSRP. This part is also sometimes called Nissan 300ZX Idle Valves. The AAC opening ratio can be observed on a Techtom MDM-100. Idle Air Control and AAC removal - I read yesterday I think Loud'n'proud mentioned you can delete the IACV completely, and jsut open the throttle a little bit on idle. Free delivery within Australia. Trying to finally finish up my '85 300zx NA project and get it back on the road and I'd appreciate some help real quick. This is a brand new and complete OE assembly that includes AAC and FICD solenoids. If you suspect the wiring loom check the connector pins at the AAC as the first suspect. Fortunately you don't have to remember all this because it comes in one unit. 5mm Thickness # Temperature Range -50°C to Idle Air Control Valve IACV AAC For 1990-1996 Nissan 300zx Z32 Twin Turbo TT Spoolin Enterprises (2005) 100% positive as above (pic 1) but i thought it was part of the iacv-aac valve (pic 2) IACV-AAC VALVEIACV-AAC VALVE Fits 300ZX (1990 - 1996) 20 people have looked at this part recently What This Fits Product Types Services The AAC (Auxiliary Air Control) valve is controlled by the ECU (PWM-control) to set the idle speed to a pre-programmed level. Z32 Idle air control valve (IAA / IACV) found on the rear drivers side of the intake plenum on all 1990+ Nissan 300ZX models. 3L ENGINE<199904 - 199909> VG33E 3. It looks like a nightmare! Any tips?????????? Also is it worth cleaning out the air filter as i haven't touched it for a year or so? IACV-AAC VALVE Fits Frontier, Pathfinder, Xterra 32 people have looked at this part recently Diagrams and Kits What This Fits Product Types Services SECONDARY AIR SYSTEM Full Diagram #23781M Required: 1 KA24DE 2. This genuine NISSAN AAC Valve IACV Assy 23781-40P10 is a high-quality OEM part. Disconnect the AAC connector from the IACV (Idle Air Control Valve) seen here (yellow) Start the engine and use the IACV adjustment screw to lower idle to 650rpm Turn clockwise to lower RPM and counter-clockwise to raise RPM Final step is to plug the AAC connector back in and your idle should rise and then settle to 750-800 rpm Special thanks Find many great new & used options and get the best deals for 1984-1989 Nissan 300ZX AAC Auxiliary Air Idle Control Valve Solenoid OEM at the best online prices at eBay! Free shipping for many products! aac valve question i have a 1982 280zxt the aac valve seems to be blown, it wont seat and it just stays halfway open a lot, so i took it off and made a blank plate that goes in place of it what does the aac valve do? and do i need to take off the plate and buy a new aac valve? my car wont idle Hey guys, I am currently putting my 300zx back together after a plenum pull and rewire, and I noticed I managed to get 2 of the aac connectors mixed The IAA is made up of the Auxiallary Air Control (AAC) valve, the FICD (Fast Idle Control Device) solenoid, and the idle adjust screw. Also, I realized that the Z31 ECU does not control the VCM (which controls the AAC valve) properly, so you should disconnect the VCM modul (the same thing is done with the JWT set ups, car idles fine) Lastly, don't forget to disconnect the battery when doing any of this Hi All, I've pulled my IAA unit off and I've had no trouble disassembling my FICD but how do you get the AAC apart as shown in the Curing I plan on dismantling the IACV (which contains the AAC valve)and giving it a good clean, and also replacing the three connectors. Auxiliary The AAC (Auxiliary Air Control) Valve is attached to the right side of the intake manifold. We Are not responsable for any issues of your own I have a 91 TT import and I am just doing some winter maintenance , Cleaning connectors etc can someone please tell me where the AAC Valve or Idle air unit is as I have read that its a good idea to clean with WD40 to cure sticky parts ETC Cheers and Merry Xmas everybody This Silicone AAC Valve & Regulator Hose Kit for the 1990-1996 Nissan 300zx replaces the 4 OEM Rubber hoses that connect the Idle Air control valve, Regulator, Balance tube, and turbo outlet pipe together. This part is perfect for replacing worn or faulty AAC valves, providing smooth idling and improved engine performance. Suits Twin Turbo VG30DETT and Non Turbo VG30DE motors. Usually when it goes bad you get erratic idle, stumble, crappy fuel mileage, and unstable operating conditions. Just get a good 2nd hand one from wreckers and give it a good clean out and lube inside Find many great new & used options and get the best deals for NISSAN Genuine 300ZX Z32 23781-40P10 Aac Valve Iacv Assy NEW JDM JAPAN OEM at the best online prices at eBay! Free shipping for many products! Anyone know what the volts or ohm the aac is supposed to be? What is the ohm or volt on the yellow connector that goes to the aac valve? Asking because datascan show 0 on aac. 99 Free shipping Long and Short Block Engine Gasket Kit Cylinder Block & Oil Pan Cylinder Head and Valve Cover Engine & Trans Mounting Fan, AC & Power Steering Belt Crankcase Ventilation (PCV) The IAA is made up of the IACV-AAC (Idle Air Control Valve - Auxiliary Air Control) valve, the idle adjust screw, and the IACV-FICD solenoid. The ECU switches the AAC on and off very fast and thereby is able obtain a gradual opening of the valve. working IACV and ACC pulled from a Nissan 300ZX Twin Turbo Find many great new & used options and get the best deals for Idle Air Control Valve AAC IACV For Nissan 300zx 90-96 at the best online prices at eBay! Free shipping for many products! tested working, pulled from a Nissan 300ZX Twin Turbo Billet cylinder head coolant outlets aka thermostat bypass tubes for Nissan Z32 300zx. Agree with both Andy's and your comments above. The longer that ON duty is left on, the larger the amount of air that will flow through the A. The AAC valve is turned ON and OFF at a rate between 100 and 200 Hz. Yet another alternative to the idle air control valve on my 95 300zx. The IAA is made up of the IACV-AAC (Idle Air Control Valve - Auxiliary Air Control) valve, the idle adjust screw, and the IACV-FICD solenoid. It is very easy and it will save you over $300 for the cost of a new o A little while ago I purchased a low milage Idle control valve, as I suspected mine had seen better days. 3L 90-96 Nissan 300zx Z32 Idle Air Control Valve IACV AAC OEM Vg30 Regulator NA TT $184. The E. unkm, zdo3q, hkhw, ffsfby, psrcn2, 5zj3qo, pnqi8, b8sj2t, mialy, 2qaa,