bigfishs

iTrader: (5)

Just installed my autometer boost guage. It reads 0 when car is off, drops to -20 psi at idle, but when I rev to 7K in neutral it rises from -20 up to around 0 psi and then drops back a bit. I reckon my connections are good, otherwise it would be leakinmg under vac as well as boost and wouldnt read a healthy -20 (which is what I believe it is supposed to be at idle).

So could it either be a crapy guage or bad vac/boost source. I I teed into this line

http://bolsen.homeip.net/index.html

as opposed to this one

https://www.evolutionm.net/forums/sh...+gauge+install

Is there any difference?

I will be phoning autometer tomorrow when they open to see what they say

SpoonEvo

iTrader: (7)

i'm guessing it's correct..mine is doing the same..

SEEYA

iTrader: (13)

it will not show boost while in neutral, there has to be a load on the motor...

bolsen

iTrader: (2)

Some *say* there is, but I've yet to see any hard evidence.

However, in this case, the problem is not with the product... or even the install. It's that you don't know what you are looking for. As Seeya said, the motor does not create boost in neutral. Moreso, the gauge does not read -20 psi... it's rated in in. Hg.(technically it's a positive measurement...) -20 psi would be a baaaaaaaaaaaaaaaaaaaaaad thing

bigfishs

iTrader: (5)

Well, I went into work and connected the guage up to our in-house nitrogen supply. It read ~19 psi, which is what it should. I reconnected it and did a quick run under load and it looks like it went to ~16 psi. Might have a leak.

Bolsen,

Does it matter if you tee in directly off the intake manifold before or after that thing (looks like it is some sort of sensor or solenoid with an electrical connection)?

Your installation is after, and the other one I listed is before.

mrbkkt1

iTrader: (6)

it's the fuel pressure regulator, and i tee'd off it the same way.
make sure there is no kink in the line, maybe check it w/ a shorter hose going straight into the cabin through your open window. that might help.

fsugatorbait

iTrader: (16)

Thats fine, your not going to build hardly any boost with no load on the motor.

bolsen

iTrader: (2)

Just a note... that clear tubing really sucks. Do yourself a favor and go to autozone and pick up some rubber vaccum line. Not only is it 10x better, but it looks better to!

mdosu

iTrader: (6)

+1 you won't build boost in neutral. Just go out and drive and test it out make sure you're peaking and holding at the right boost. You can build boost in neutral with a boost controller and an ems...

In theory, you're suppose to tap it at link#2 you posted. My dad's friend who works on cars told me if you tap it at link#1 location, the data will be slightly modified, but not by much and not all the time.

I also heard that Evos that came with the factory boost gauge tapped it at Link#1 location. Can someone confirm this please?