Boost gauge line problems..long

[4gfun]

I have done some searching, but the setup in my engine bay looks different than some of the threads pics that I have seen.

I haven't been able to snap pics though.

This is how my setup was:

I had an autometer phantom boost gauge connected to the "p" port of the throttle body.

The VFAQ and a few posts here seem to imply that I can connect the vacuum line directly to the throttle body.

On my DSM (It may be the same for others), There is a vacuum line coming directly off the "p" port of the throttle body and then a tee about 4 inches off of it. One end of that tee goes somewhere else (sorry it is really dark where I live) and the other end has a few inches of vacuum hose. The way the previous owner had it set up was to run the nylon tubing directly into that hose.

I don't like the way it sat even though it was zip tied. It pulled right out.

Was this still the right place to tap the hose in the first place? I know there is an alternate location e.g. the fuel pressure solenoid etc.

Should there really be a tee there to start with and was running the nylon inside the hose the right way?

The other half of the mess was that my mach V gauge holder in the center AC vent that kept falling and eventually ripped the nylon line behind the gauge.

I went to my auto parts store and they didn't have 1/8" vacuum hose, so I bought a nylon kit for another aftermarket boost gauge.

It was a tight fit, but it looks to me like the nylon is free to back out.

This should be a really simple problem, but I am super busy working and hardly have any time to resolve it.

Any thoughts on what to do and/or where I can get solid tubing/fittings that won't fall apart so that I can stop hassling with this??

Thanks

 

[turbosax2]

If I were you, I would ditch the nylon tubing and get regular vacuum hose. The nylon tubing can crack and kink easier than the vacuum hose will. You just have to get a hose barb and screw it onto the back of the gauge. You can get any size vacuum hose you want then, just match the barb size to the hose size.

You can connect the line directly to the p port on the throttle body. The way the previous owner had it set up works fine too, because the line is still seeing boost and vacuum from the p port because of the tee in the hose. You can also tee the line into the fuel pressure solenoid hose. Any of these ways work - it's up to you to decide what looks cleanest and is easiest to do.

 

[4gfun]

If I were you, I would ditch the nylon tubing and get regular vacuum hose. The nylon tubing can crack and kink easier than the vacuum hose will. You just have to get a hose barb and screw it onto the back of the gauge. You can get any size vacuum hose you want then, just match the barb size to the hose size.

You can connect the line directly to the p port on the throttle body. The way the previous owner had it set up works fine too, because the line is still seeing boost and vacuum from the p port because of the tee in the hose. You can also tee the line into the fuel pressure solenoid hose. Any of these ways work - it's up to you to decide what looks cleanest and is easiest to do.

Thank you very much. Can I get vacuum hose at lowes? The auto parts stores in my area well ehmmm, you know.

Do you know if it is normal to have a tee sitting right off the "P" port anyways?

I know that is a bit subjective and you drive a 2g.

 

[turbosax2]

I can't say that I have ever seen vacuum hose at Lowe's, but then again I've never looked for it there ANY auto parts store SHOULD have some size vacuum hose - if not, then, well....wow.

Sorry, I don't know about the tee on the p port.

 

[turbosax2]

Here is a vacuum line/emissions diagram for a 1g.

 

[4gfun]

Here is a vacuum line/emissions diagram for a 1g.

Thanks, I have seen that. I don't see the TB on there I am blind .

Oh well, I think this is issue is now nearly a non issue. Bring gauge to store, get the smallest vacuum line I can fit around the back of the gauge...

Only problem I see is that the vacuum hose size for the gauge is gonna be bigger than the tee.

I guess I will have to get an adaptor or something?

 

[turbosax2]

I marked the throttle body in the picture below.

When you get the vacuum hose, get the closest size you can that's bigger than 1/8. If the size is close enough, you should be able to fit the hose on the tee and have it still be fairly snug. You can also buy tees that have different sized nipples on each side. Make sure you zip tie all of the hoses at the tees and the throttle body so you don't have boost leaks.

Once you buy your vacuum hose, get a hose barb that matches the hose size. Make sure to get the proper size threads so it can be threaded onto the back of the boost gauge.

 

[4gfun]

I marked the throttle body in the picture below.

When you get the vacuum hose, get the closest size you can that's bigger than 1/8. If the size is close enough, you should be able to fit the hose on the tee and have it still be fairly snug. You can also buy tees that have different sized nipples on each side. Make sure you zip tie all of the hoses at the tees and the throttle body so you don't have boost leaks.

Once you buy your vacuum hose, get a hose barb that matches the hose size. Make sure to get the proper size threads so it can be threaded onto the back of the boost gauge.

Thank you for your patience. It is one of those mountain out of a molehill thing, but this definitely needed to be addressed!

Appreciate your marking the drawing!

 

[2GAWD4U2NV]

Another idea while you are at it could be running your manual boost controller line to the fuel pressure solenoid; that is if you have one. I have my AutoMeter ProComp UltraLite Boost Gauge and Hallman Pro RX MBC teed into this line. Boost holds perfect. My boost gauge reads (-) pressure (vacuum) and (+) pressure (in boost) right on the nose. This is just my opinion where to tee these two "add ons." Really, it's just personal preference. Lol.

 

[turbosax2]

Another idea while you are at it could be running your manual boost controller line to the fuel pressure solenoid; that is if you have one. I have my AutoMeter ProComp UltraLite Boost Gauge and Hallman Pro RX MBC teed into this line. Boost holds perfect. My boost gauge reads (-) pressure (vacuum) and (+) pressure (in boost) right on the nose. This is just my opinion where to tee these two "add ons." Really, it's just personal preference. Lol.

The mbc should not be tee'd into the fps line, but this has been debated numerous times before.