*BREAKING* James Judd's Forged 1.9 Mk3 Ibiza HTA GT2868R Build *BREAKING*

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yellacupra

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how do you by pass the n75 valve mate? loosing my boost and its annoying me
 
Jul 4, 2010
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how do you by pass the n75 valve mate? loosing my boost and its annoying me

N75 may not be the reason you are loosing boost have you checked for boost leaks?

But to bypass your N75..

You need either an electronic boost controller or a manual boost controller.
I used a manual boost controller (use a forge unos it is the only one that works)

Basically you disconnect all the pipework from the N75 but still leave it electrically connected so the ecu doesnt get confused.

Block up the pipe in the TIP where it inserted as you no longer need that.
Fit the boost line (the one coming from the charge pipe) into the bottom of the MBC
Fit the Actuator line in the side of the MBC.
Job done!

Make sure you start off at the lowest boost setting (actuator pressure) and increase gradually whilst logging or at least using your boost guage.

Hope this helps mate.
 

yellacupra

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only just got the car and the engine light come on so i plugged it in come up with fault code p1556 negative charge. changed all boost pipes so dont know what else can be unless you have any ideas mate?
 
Jul 4, 2010
2,170
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only just got the car and the engine light come on so i plugged it in come up with fault code p1556 negative charge. changed all boost pipes so dont know what else can be unless you have any ideas mate?

Hmm.. that is a charge pressure fault code. The obvious one would be a boost leak.. have you had it actually boost leak tested anywhere?

The only other 2 options I can think of is N75 like you said or maybe MAP sensor (boost pressure sensor between the intercooler and the throttle body)

I would defiantly get a boost leak test before you do anything and if that doesnt work then a new N75 or MBC and if that still doesnt work try the MAP sensor
 

yellacupra

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yeah checked it all and had a few perished pipes so changed them all so it cant be that. it runs a little better but still no boost. i will try a n75 valve see how that goes thanks mate
 
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