Smoke face boost gauge wiring

[GunMetalR33]

The MAP reading has to come from a MAP sensor. R33's have them for the stock boost gauge near the speedo but they are only good to read about 1 bar I think. They are located in the top left on the engine bay if you are look from the front of the car.

also do u hook up electrical the same as mechanical? where do u get the MAP reading from?

[Restless 33]

so how should i hook it up...

i was going to jsut run a t-piece into the stock boost line and use that.

it needs constant power coz it's smoked face so do i use the MAP or mechanical?

i tried tightening the two things over the nipple part but it didn't want to crush.

i tried using some plyers to see if i could cruch it a bit but it was pretty hard. i don't wanan strip the parts trying to crush it.

any more help is GREATLY appriciated thanks guys

[GunMetalR33]

OK. when you look at the front of the Plenum (the thing connected to your throttle body) you will see a thin black hose comming out of it. Patch into that with a T peice. If you get some thinner pressure hose the "nipple things" will work!

Then connect the const (red) and the ground (black) and see if it works? If you find that the light is always on even when the car is off then patch the const to the cigerett (spelling?) lighter wiring (thats what I did).

Do this all in your engine bay first to see if it works...

[Restless 33]

cheers mate i'll try that

[GunMetalR33]

edited ^^^

[46n2]

It might not be mechanical: It sounds to me like the MAP sensor might be in the guage it self (I know it sounds stupid but it fits the facts). This means that you need the tube in the back for the MAP sensor, const power for the MAP sensor (red), acc for the light (yellow) and ground (black).

I thought that electrical boost/vaccum gauges didn't require a connection directly to a vaccum line (ie - from the vaccum lines in the engine bay :confused: ) They get their signal from a factory fitted or aftermarket sensor which sends the signal electronically - hence 'electronic' boost gauge vs mechanical?

[Restless 33]

ok update...

today i earthed the black wire obviously then placed the red wire on the positive battery and the gauge lit up. (it's smoke faced remember and has 7 different colors (i'll stick to plain lite up i think ) anyway i tried removing the red wire and placing the yellow on the positive and i got nothing.

Does this help anyone work out wat the other wire is for. and should i connect it to a constant so it's always getting lit up when ever the car is running. where wud u splice into for this?

still a little lsot on this one

thank for ur help so far

[danh]

restless 33,

ok, its obviously mechanical because of the piping and nipple thingy in the back of the gauge itself.

firstly, is the gauge supposed to be illuminated constantly, then maybe dim when the lights go on like digital clocks etc...?

does it have any sort of memory function, such as remembering what colour you had it set on?

my guess is

black is ground, it always is.

yellow is constant power because it is clearly much larger than the other wires

red is accessory power, because u said it turned on the gauge..

i think this is the most likely setup for this gauge. i am almost 100% sure this is what the wires are for

if your brave, you can test this by

-grounding black,

-hooking up red to power, then try changing the colour of the gauge, set it on a different colour to what it turned on with.

-pull off the red wire, then put it back on, if its back to the first colour then obviously the yellow is needed for constant power for memory of the colour settings.

-and then red is Accessory power to turn on the gauge when the car is turned on.

i would ground the black to the chassis, or negative of ciggie lighter power.

hook up yellow to a constant power source ie headunit, clock, key barrel,

and red needs to go to an accessory power source, ie ciggie power, etc

hope thats it or i'll feel stupid...

dan

[Restless 33]

thanks mate, i'm still learning everythign bout cars as my 33 is my first. that should be everything i need.

u were right saying it goes back to the first color.

thanks heaps i'll chuck it in asap

[danh]

no worries,

glad it worked out..

sorry i cant help u with the install of the boost hoses etc, but im sure someone here will...

dan

[made_guy]

old thread i know, but i think mechanical v electronic but refer to the internals of the gauge itself, not whether or not it gets 'plumbed' directly to the gauge. Reason i say that is cos i have an Apexi ELI Boost gauge that only has electrical wires going into the gauge, but it is listed/sold as a mechanical gauge....

it runs off the factory MAP sensor.