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My r32 gtr headlights are on they flicker every few seconds all the time even when idling when i hear a click from a relay in the boot on the passenger side at the back.

so i disconnected the relay and the 4wd warning light comes on so i figured out its the 4wd pressure unit relay.

Is it normal for the pump to run for a second every few seconds

does any one know if there is a check valve to hold the pressure

no oil drips from the car so its not leaking externally

any help on this appreciated.

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mine does that every 25 or so seconds.  I think it keeps the acumulator for the attessa unit at 200psi or so (primed to go when it actuates the transfer case clutches).

thanks Sean

im gonna try bleeding it to see if that helps 25 seconds seems more reasonable to me if i can get it to run every 25 ill be happy.

I think i located the bleeding connector in the console ( plug with black/yellow wire?) but it is not running the pump when unplugged . my manual says right side of passenger dashboard, this one is in the centre console near the stereo.

Any one used the bleeding connector?

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hey i think it is down in the driver side footwell (by the accelerator from memory). It is easy as. MY old gts4 used to prime when the car started which was easy to hear, couldnt hear it any other time. maybe yours has air in the line, if so this should fix it. make sure you have the resoivoir topped up well as it pumps thru quite fast and empties it out quick!

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