Thread: Air regulator or iacv

This part:




Isn't on the lowport b15 engine. What it does is it has a heater which opens up a cork that allows more air to the engine as the engine heats up, after a while it's fully open, and operates on the same power line as the fuel pump. that being said, since it doesn't exist on a lowport b15, my question is this:

1) Why isn't this item on a lowport engine?
2) Does the stepper motor iacv from the b15 auto motor (which used to bolt to the b15 throttle body) compensate for the lack of it, and
3) Can i remove it, manufacture a plate that the auto b15 lowport iacv can nipple off and use the same air lines the old air regulator used and get the same result?

This way, I can use the b15 iacv, b15 wire harness, highport throttle body, and after an idle relearn, should be operable.

Input?

I consider that part the Air Regulator. I've been having issues with mine on my G20, so I have several laying around the garage.

1) The air regulator is on the lowport engines, but I do not know about the B15's. My 95 P10 (lowport) has one, and you have to pull the upper plenum to get to it. Almost right behind the injector on the passenger side (#1 I believe).

I'm not sure on the rest of your questions, but I was under the impression that the air regulator opens more at colder temperatures, and then closes as the engine heats up (less air) along with the electric current fed it.

Josh

that could be the case on how it works, I'm not sure. On my b15 lowport, there isn't anything over there other than the old iacv which on a b15 is mounted to the tb (which I can't use). So if I keep the air regulator on AND the b15 iacv as described below, do you think that's going to mess with the engine because it allows too much airflow (more than the lowport got because of the extra air regulator) I'm not 100% on how much more air the iacv on an automatic b15 allows through compared to the iacv on the old highports, but I do know the range of air it lets through is significantly more than the old highport one. perhaps even enough to compensate for the lack of a air regulator. Anyone who can verify the lack of anything below the intake plenum on a lowport would answer that querey I believe, so feel free to chime in!

additional note: The only thing on a b15 that even resembles the name 'air regulator' is a double nippled plastic fitting that opens when there's pressure on the ps pump to allow more air to compensate for it working harder, which coincidentally is the only item over there having to do with the intake plenum.

I hope that explains it. Thanks for the insight so far!

courtesy of wnwright:

That is for high idle to warm up with older ecu's. You can't use it with b15 ecu. So no need for it.
did they replace it with something else to do the job?

yeah all in stepper motor of b15 idle control

so there you have it, when putting a highport into a b15, the air regulator valve is not necessary, allowing me to use the hoses for my nippled attachment to accomodate the stepper motor. that means i have to fabricate a block off plate to place over the old iacv location.

For me, i'm considering the fact that i'm prefer on using air regulator for my car...





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A cool idea from SEO Test

if you want to, you can use a b13 one, but two things need to happen- 1) you need 2 hoses and the places to put them, between the air intake and the intake manifold. and 2) find the wire that the fuel pump runs on, and splice it. the air regulator from a highport isn't computer controlled, it just runs on the same power system as the fuel pump.