![]() The entire assembly is on the right hand side of the engine (looking from front of car), it’s comprised of hoses, a black plastic resonator, the metal AIV unit, solenoid unit, and black bracket which bolts everything to the car.ĮASIEST SOLUTION: Simply disconnect rubber hose that goes from AIV unit to air box. Only the older s13 hatchback model 240sx’s will have this unit, Nissan realized it was almost pointless and caused problems as it aged, so they discontinued it in the s14 and s15 lineup. Deposits from exhaust can coat MAF and cause ECU to read the wrong amount of intake air flowing past it. ![]() This can cause your cars idle to bob or drop below what it’s supposed to, also can cause slight stumble during acceleration. If reed valves become gunked up in the AIV unit, exhaust gas and condensation will be allowed to flow into the intake.(ie air box where air filter is). In california it is closed loop during idle so you may not need it for idle test. *(In british columbia, the aiv will help you pass the idle test. KEEP ALL PARTS as you will need for emission inspections and when you sell car. You have two choices: Remove it entirely or simply disconnect one hose.
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