HELP NEEDED vacuum gauge hook up

[L0rolla1]

hey guys.

jus got me a autoauge carbon faced vacumm gauge for my 96 rolla wagon with blacktop 4age
i can handle the lighting side of the gauge but at to the location of where to plumb in the sensor....ive got no idea

if anyone could help or even post a pic showing me where thatd be greatly appreciated

thanks heaps

[Bumpy]

is it a mechanical gauge or guessing buy your question it's electronic cause you have a sensor?

Plumb your sensor into your plenum (the thing after your throttle body but before the head) you should be able to T off a pipe that is already there.

[L0rolla1]

its mechanical i think, it came with a long piece of clear rubber tubing. inly the lighting is electric

any particular on i shold be looking for theres a few lines there

[Bumpy]

Not really, find a pipe the only goes to one thing, and doesnt carry on maybe.

If you have a look at some car magazines at turbo cars, you want to put your vacuum gauge where they hook the blow off valve up to.

Cause the blow off valve is actuated by vacuum.

[L0rolla1]

cool we got a p.car mag at wrk with the turbo trueno in it with the blacktop in it. i'll have a look see tomro

cheers

[L0rolla1]

ive jus hooked up the vacumm gauge and i think ive hooked it up to the right thing. i 1stly took the tube at the intake off and put my finger over the end going away from the intake and turned the car over, i could feel suckshn. so asumed that was the right one, also the end that i had my finger on went to a little black box/plug thing which has 'sensor assy vacuum' stickered on it

hooked that all up and hoped in the car and started her up. apone starting of the car the gauge goes upto around 15 -20 then wen i give her a rev it goes down, i dont really no sh*t all bout the vacuum gauge. wen i rev it should it go up or down

(up being higher numbers down being lower)

have i don it right

it lookes good eitherway

if i new how to put pics on here i would take a pic to show wot the cr*p im on about. if someone could tell me how i'll get right onto it

[Calvin]

hooked that all up and hoped in the car and started her up. apone starting of the car the gauge goes upto around 15 -20 then wen i give her a rev it goes down, i dont really no sh*t all bout the vacuum gauge. wen i rev it should it go up or down

(up being higher numbers down being lower)

My brothers Subaru used to do that on his vac gauge.. I guessed it was just where he plumbed it. Not 100% sure. but look for some other vacuum lines. There is one good one around the intake somewhere

[Zak]

When your car is idleing, it will have high vacuum, as it has to suck all the air past the throtal body, or bodys in your case. When you open the throtal, you remove that resistance so you will have a lower vacuum.

On a turbo car, a vauum/boost gauge can be usefull, but on the n/a car there is no point what so ever.

Yours is working properly from the sounds of things

[slighty_sykotic]

ive jus hooked up the vacumm gauge and i think ive hooked it up to the right thing. i 1stly took the tube at the intake off and put my finger over the end going away from the intake and turned the car over, i could feel suckshn. so asumed that was the right one, also the end that i had my finger on went to a little black box/plug thing which has 'sensor assy vacuum' stickered on it

No, its wrong.

Move it.

Your vacuum (map) sensor must have it's own line, and not have anything t'd off it.

Put it on the fuel pressure reg or something.

--Sykotic

[method]

ive jus hooked up the vacumm gauge and i think ive hooked it up to the right thing. i 1stly took the tube at the intake off and put my finger over the end going away from the intake and turned the car over, i could feel suckshn. so asumed that was the right one, also the end that i had my finger on went to a little black box/plug thing which has 'sensor assy vacuum' stickered on it

No, its wrong.

Move it.

Your vacuum (map) sensor must have it's own line, and not have anything t'd off it.

Put it on the fuel pressure reg or something.

--Sykotic

The readings are right, but the line you hooked it up to is no good.
If your map sensor gets the wrong vacuum reading you could damage your engine.
So you don't want anything that could mess with the readings hooked up to it.

As Sykotic said, hook it up to your Fuel Pressure Regs line.

[L0rolla1]

ok thats sounds like good advice. but as i am not really clued up on the whole engine thing i have no idea where that is on my engine. if you could tell me id really apreciate it i have the blacktop 20v

cheers

[SUBARUCONVERT]

theres no way that having a vac leak to the MAP sensor on a NA engine will cause damage, it will see less vacume if there is a leak and add more fuel, less timing and the car will under perform. If this was turbo and MAP sensor it would be a problem. theres no reason to move the line you are Tee'd into, if u tee into the FPR line and have a leak u will have problems just like if u had a leak at the MAP sensor

[slighty_sykotic]

theres no way that having a vac leak to the MAP sensor on a NA engine will cause damage, it will see less vacume if there is a leak and add more fuel, less timing and the car will under perform. If this was turbo and MAP sensor it would be a problem. theres no reason to move the line you are Tee'd into, if u tee into the FPR line and have a leak u will have problems just like if u had a leak at the MAP sensor

Its still wrong.

The map sensor is not about the leak, its about the pressure waves/drop from having another line to pressurise. Hence why EVERY aftermarket MAP ecu warns to use a dedicated line for the map.

[SUBARUCONVERT]

A vac gauge is hardly a lagre volume to create vacume in. its not like hes running a brake booster off it. If you want to get silly about it then he should be making an individual vac take off the manifold, and not teeing into anything