2nd Generation Specific (1986-1992) 1986-1992 Discussion including performance modifications and technical support sections.

S5 NA - How To Wire VDI to Knock Sensor and 6pi to Boost Controller?

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Old Mar 31, 2009 | 07:13 PM
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S5 NA - How To Wire VDI to Knock Sensor and 6pi to Boost Controller?

VDI is the white plug. which of the two wires goes to the knock sensor?

then the boost controller. there are black and blue wires. where do I connect these wires to? I dont remember the plug color for the 6pi, but there are a couple with black/blue wires.

normally this stuff doesn't matter, but my swap is stock and 5psi sucks.
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Old Mar 31, 2009 | 08:26 PM
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From: North Aurora
walken... If you have after market down pipe and a normal intake pipe you should be seeing more than 5 psi because of free'd up exhaust and open intake.
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Old Mar 31, 2009 | 08:53 PM
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stock cat downpipe, stock cat, dual muffler. stock airbox with K&N drop in.

my only mods are emissions delete and turboXS BOV.

stock wastegate is 6psi so the flow really sucks on this.
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Old Mar 31, 2009 | 11:28 PM
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this is what I've found out. the wires are the same color for the duty solenoid and the 6pi. just need to know what color plug it is.
blue/white and black/white (this is with the middle notch facing up)


now the knock sensor is 2m on the ECU side. the vdi connector is white and the wires are yellow/black and black/white YB goes to the ECU. on the turbo model this wire is just white.

so to connect your knock sensor run a wire to the yellow/black wire.
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Old Apr 1, 2009 | 05:23 PM
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the 6pi plug is brown. mine were covered in gunk and it was hard to tell between yellow and white stripes.

once plugged up the car ran great! went from .3 bar on this 45* morning (wtf?) to .7-.75 bar once the duty solenoid was plugged in. I'm now debating swapping exhaust as if it needs it lol
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Old Apr 1, 2009 | 07:50 PM
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Well if you swap out exhaust's it'll for surely help you out a lot.
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Old Apr 2, 2009 | 03:25 AM
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you think it would, but my stock s5 t2 with rb exhaust actually is slower. I don't know what the problem is on it, but I think that duty solenoid had to be defective. this setup boosts so much better.
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Old Apr 2, 2009 | 08:33 AM
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Stock tid ftl. Also Turbo good and everything? When is full spool? Maybe you've owned the car long enough not to even notice any power.
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