Stripped this out of my scrapper under the wheel arches either side? Not sure what it does/called, any help please

 

Thanks

 

AIVs dude

The air induction valves (AIV's) only exist in the z32 models 1990-1992. The AIV's are part of idle emissions control. They introduce air into the exhaust before the catalytic converters so that the "cats" will work cooler and more efficiently. Removing the AIV's with a stock ECU chip in place can give problems passing state inspections for emissions at idle. The car will still run the same with or without the AIV's. The instructions here are for discussion purposes only, and not intended as a recommendation or endorsement for doing anything illegal to a car that might cause an increase in air pollution. Please review this site's Disclaimer.

 

 

There is an AIV solenoid along with a tangle of vacuum tubing under the hood. The AIV's themselves are in the front fender wells, behind the wheels. The plastic fender liners are peeled back to access the AIV's. There is AIV metal tubing or so called "air tubes" that run from the AIV's to the exhaust midpipes under the car, connecting just upstream from the catalytic converters. There are AIV air tanks deep in the fender wells. Most people, including me, just leave the air tanks alone unless the fenders are already off for some other reason.

 

 

The AIV's seem to come to the attention of Z owners either when their exhaust system or ECU chip is being upgraded. Many aftermarket mid-pipes or test pipes do not have bungs to connect the AIV "air tubes" to the exhaust. That is the perfect time to delete the entire AIV system. Then there will not be any plugged holes or capped tubing to catch unwanted attention during a visual inspection. When upgrading the exhaust, be aware whether or not the new midpipes have bungs for the AIV air tubing. Removing or deleting the AIV's while the stock midpipes are still in place is harder, but can still be done. Making sure the car can still pass a visual inspection should be a priority.

 

 

All the aftermarket ECU (Electronic Control Unit) chips of which I am aware delete the AIV function. I have a Jim Wolf Technologies ECU chip, so the AIV's in my car were just taking up space and weight. After I installed my chip, I disconnected the and removed the AIV solenoid under the hood, and cut the vacuum lines from the solenoid at the right and left fenderwells leading to the AIV's. The AIV vacuum lines are T'd into I drove around like this for a couple of years before I finally got around to removing the AIV's units themselves, when I had the car on jack stands for some other reason.

 

 

The AIV's are out of sight, so leaving them in place after a chip upgrade is acceptable, no harm, no foul. Getting rid of the AIV solenoid and vacuum hoses under the hood does clean up things a bit. My overall philosophy is to simplify the engine bay as much as possible, and getting rid of the AIV's themselves does help the heavy Z lose five or six pounds. However, if passing a visual inspections is critical for your Z, then you can simply leave the system in place. If in doubt, leave it alone.

 

http://s95014253.onlinehome.us/63104/137858.html

 

need to remove them from your silver one! ;)

Nice one Bazza, didnt know all that, cheerZ

I hope the above information is correct - after all it is from memory :sweatdrop:

What a guy. :thumbup: wish i could pull that kind of info out of my ass from memory. i have a hard job remembering what happened last week lol.

 

Peter

hahahahahaha