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Trying To Override Factory Boost Solenoid, Help?

IslandBoy
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IslandBoy Explorer

IslandBoy

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Hi I'm trying to override the factory boost solenoid thingy. I cannot find the solenoid, I have an SII r33 rb25det in a 240sx.

I want to ground the solenoids ground wire permenatly as done in the DIY section, however I cannot find an ecu pinout that shows exactly which wire it is. Can anyone tell me where this darn wire is? Thank you!

IslandBoy Explorer

IslandBoy

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you probably dont have it

the solenoid is drilled to the wall of the engine bay in a skyline

easy way to override it is to just run a vacuum hose from the charged piping straight to the wastegate actuator

I just did that, it still does the same thing, goes to 5lbs then evntually to about 9lbs of boost. Is this some form of boost spike? Or is there a hidden boost solenoid built into the i/m or is everything just normal?

Also when I hit boost cut wil the car cut ignition/fuel or both?

Shockster0429 Enthusiast

Shockster0429

Posted
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I just did that, it still does the same thing, goes to 5lbs then evntually to about 9lbs of boost. Is this some form of boost spike? Or is there a hidden boost solenoid built into the i/m or is everything just normal?

Also when I hit boost cut wil the car cut ignition/fuel or both?

if you have an FMIC and exhaust its going to creep a bit... mine was creeping to about 9 lbs after installing mine. Its normal.

IslandBoy Explorer

IslandBoy

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if you have an FMIC and exhaust its going to creep a bit... mine was creeping to about 9 lbs after installing mine. Its normal.

So if i put a boost controller on could it creep any higher?

Shockster0429 Enthusiast

Shockster0429

Posted
Posted
So if i put a boost controller on could it creep any higher?

if you don't leave it completely loosening, if you add pressure to the MBC's spring it will increase the boost pressure. I wouldnt run more than 11-12 psi. After that its hit or miss on how long the turbine wheel stays attached...

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