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pipes backwards or around the wrong way will also cause this

basically its running unlimited boost it sounds like

if this is the case - then the wastegate never opens

so usual culprits are air lines or vac hoses backwards to the actuator never gets a pressure signal

other known suspects can be the wastegate flap hitting the turbo housing if its a new turbo / dump setup etc

check the actuator rod with a pressure gun it should be move freely with say 10psi of pressure (or whatever spring you have)

try here

http://paulr33.skylinesaustralia.com/

be sure to note where COM and PORT go

for the powerfc boost kit which uses the same parts etc

How do I hook up the optional Boost Controller kit?

The optional boost controller kit for the Power FC consists of the pressor sensor, pressure sensor harness and solenoid. The solenoid should be plumbed between your manifold and the wastegate actuator (internal wastegate setup). For external wastegate setup it should be plumbed between the manifold and your external wastegate pressure line. The pressure sensor should be plumbed in parrallel with the factory MAP sensor which is used by your standar boost guage.

The solenoid has two labels on it, you should match them accordingly

COM line should goto wastegate actuator

NO line should goto intercooler piping

It can be T'eed into the plumbing with its included T piece fitting.

yes it will, unlimited boost means;

pressure in the manifold isn'y held back by anything so it will just rise to whatever the turbo compressor wheel can supply

this will stress out lots of components in the engine such as seals, valves, joiners etc as pressure will be around 1.3 bar somewhere if its the stock turbo

this will also dial in a truckload of heat into the intake charge which will induce poor performance and detonation city

instead of the intake charge being say 35 deg air temp at 10psi it could be 65deg air temp at 1.3 bar

it will cause more detonation, risk lots of components and generally be a time bomb

you should see the stock boost guage or your aftermarket guage fly past 1.0 bar and rise way past it

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