Connecting the a/f gauge

[BobWrinkle]

I have figured out using my superior intellect that the vr4 has a "1 wire sensor" (feel free to to tell me i'm wrong).

However i now need to connect the "gray" wire to it.

What is the best way to do this?
Does anybody have some tips on running the cable through the engine bay?
If i connect it at the manifold end, do i need to get heat shielding for the cable and if so where would i get it?

Cheers
Cade

 

[Entaran]

Easiest way to do this whole procedure is to have an exhaust shop put a bung in after the turbo dump and run the whole shebang from there. Have the bung suit the sensor that came with the gauge (IE: 1/8th NPT or whatever)

I suggest you insulate the wire, any wire that runs near super hot areas (like exhaust pipe) will need stainless steel sleeving, the rest can be done with plastic split conduit. I personally run all wires through the grommit for the steering column.

 

[BobWrinkle]

Cheers

ok but that means i want to have my new exhaust first. By after the turbo dump do you mean in the front pipe?

 

[Entaran]

yeppers. before the flex and after the turbo.

 

[bazeng]

that wire goes to the ecu

find the 02 wire at the ecu, and connect it there.. no wires needed to go through the engine bay..

 

[VR-4-PLAY]

I have figured out using my superior intellect that the vr4 has a "1 wire sensor" (feel free to to tell me i'm wrong).

However i now need to connect the "gray" wire to it.

What is the best way to do this?
Does anybody have some tips on running the cable through the engine bay?
If i connect it at the manifold end, do i need to get heat shielding for the cable and if so where would i get it?

Cheers
Cade

are u talkin bout a proper wideband unit? or just a gauge that reads from the standard O2 sensor?

 

[BobWrinkle]

that makes more sense baz :lol:
Sorry i know nothing about this obviously.

How can i tell what cable is the o2 sensor?

And where the hell is the ecu

I feel like such a noob

 

[BobWrinkle]

can some one tell me at least what the ecu looks like?

Is it near the fuse box?...I ahve looked everywhere and i can't see anything nthat looks ecu like

 

[3zercrowd]

Here is what it looks like Bob:

Located in the front passenger side kick panel, below the glove box or therabouts :wink:

 

[Entaran]

It's actually directly to the left as the same height as the glovebox catch. Look at the catch, follow the line left, when you get to the wall of the car, stick your head under and look up. Lots of wiring heads to one silver box. Bingo, ecu.

Now enjoy removing the kickpanel and probably glovebox too (BE CAREFUL OF THE LITTLE SWITCH AT THE BACK FOR YOUR GLOVEBOX LIGHT) to get the thing out... it's secured with two or three 12mm bolts.

 

[vertex_vr4]

Hey entara,

have u got an ecu out without removing the glovebox?

Im looking for a quick way of popping in and out chips on the ecu but removing all that crap .... :x :x id rather not

 

[WRCVR4]

Glovebox can stay in, but plastic pannel under it needs to be removed (mines permantly out)

First time its easier without the glovebox (you can see more of whats going on)

 

[BobWrinkle]

can someone tell me what colour the o2 sensor wire is, or how to find out which one it is?

About to to have a look.

 

[BobWrinkle]

hey guys no probs finding it thanks

But how do i know what cable is what?

I really dont want to try continuity testing with a multimetre :?

Anybody know or have a wiring diagram at hteir disposal?

 

[BobWrinkle]

Ok
I found this on fastfours.com forum:

And i plugged a cable (kinda dodgely) into the air flow signal.

All i got was 3 little lights and that was it?

Is that the wrong line?

 

[BobWrinkle]

ok i realise now i plugged it into the wrong thing, air flow sensore and oxygen sensor are 2 different things
But after following this wiring diagram:

It seems my car is never in optimal. Well only when the revs are about 3rpm. Otherwise its lean, and the more u rev the richer it gets??

I would have thought this would ahve been the other way round?

 

[ZedEx]

Ok once again i could be wrong but...

I believe it is lean when your on idle because the engine is not on load and its not going to be knocking or hurting the engine running that bit leaner... where as when your up in the revs and boosting there is load on the engine therefore it richens up to keep the engine safe and from knocking.

 

[CLuTZ]

narrowband a/f meters are a waste of time, its like licking your finger and holding it up and saying "theres a 5kph wind" when there's really 10.

sorry to give you the bad news,

dre

 

[BobWrinkle]

LOL,

Ok well ill just use it to impress the ladies then :wink: