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Aac Valve

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Hi peoples! I noticed while i was snooping around my engine bay that the the brown outlet on my aac valve doesn't have anything plugged into it.I have a forward facing plenum on my RB25 and the brown and purple outlets are not easily visible or easy to reach.I can't see a brown plug with wires attached that matches the brown outlet on the aac valve.I have however fond a dark blue on dangling around the same area. The purple plug on the aac valve is currently connected.Will it have any adverse effect on my engine if the brown plug remains as is?

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MrStabby Grand Master

MrStabby

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you unplug it when setting the correct idle rpm, are you having idle issues?

Yeah the electronics do some sort of compensation, so you unplug, adjust idle, reconnect. I'm guessing without it connected you could expect the idle to be too drop low when the air con is on?? Or maybe when its cold?

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It still idles at around 1000rpm when cold and idles between 750 &800 rpm when warm.still seems to idle around 750 with A/C on as well.Doesn't concern me too much,just wanted to make sure it wasn't damaging the engine or anything.

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ClutchBurndout-:( Grand Master

ClutchBurndout-:(

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It still idles at around 1000rpm when cold and idles between 750 &800 rpm when warm.still seems to idle around 750 with A/C on as well.Doesn't concern me too much,just wanted to make sure it wasn't damaging the engine or anything.

nope it wont damage the engine

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BH_SLO32 Proficient

BH_SLO32

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There should be a brown plug for the AAC (idle speed control). The purple plug is for the FICD solenoid. Basically it increases the idle when the AC is switched on. The dark blue plug is for the air regulator which operates independent of the ECU and is used to increase the idle when the engine is cold. The air regulator closes once the engine gets warm.

If the AAC is not connected there must be another means of idle control (presumably you have an aftermarket ECU).

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There should be a brown plug for the AAC (idle speed control). The purple plug is for the FICD solenoid. Basically it increases the idle when the AC is switched on. The dark blue plug is for the air regulator which operates independent of the ECU and is used to increase the idle when the engine is cold. The air regulator closes once the engine gets warm.

If the AAC is not connected there must be another means of idle control (presumably you have an aftermarket ECU).

Yes, i have power fc. thanks for your info mate. So in other words if i put a stock ecu back in it would idle crappy?

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