Boost/Pressure Sensor Mod: Wire question..

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Apr 30, 2008 | 03:51 PM

Hazard15301

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Boost/Pressure Sensor Mod: Wire question..

Hey guys. I was following AaronCake's writeup on engine grounds, but I just had a quick question. It says to ground the brown/black wire (for '86-'88 cars). I don't have that one.. So I'm just assuming that the black wire is my ground, even though it says it's for '89-'92 cars. Mine is an 88 by the way. Is this correct? I just wanted to ask before I grounded something I shouldn't have.

Apr 30, 2008 | 04:18 PM

arghx

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From: cold

ground the wrong one and you will blow the EGI fuse. Ask me how I know.

Apr 30, 2008 | 04:29 PM

Hazard15301

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Good thing I asked... So what one is it then?

Also... Here's mine.

Last edited by Hazard15301; Apr 30, 2008 at 04:44 PM.

May 1, 2008 | 03:30 AM

Hazard15301

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Rotor Junkie

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So.... Maybe just ground the black one then... Hm...

May 1, 2008 | 07:18 AM

Force Fed

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Check the FSM.

May 1, 2008 | 03:50 PM

Mankdrake 2661

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Late in '88 some of the harness changed. Trying to fix and update stuff for '89-'92, I believe.

Jun 11, 2008 | 06:47 AM

hIGGI

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according to ECU pinout, PIN 2C is GROUND on ECU and connects by B (Black) wire to pressure (boost) sensor

I have same colors like yours on S4 car and i am going to add ground to Black wire......

Black White goes to ECU pin 3L (Main Relay)
Brown White goes to ECU pin 2A (V-Ref)
Brown Red goes to ECU pin 2B (Boost Sensor)