Vacuum Leak?

[MSP2024]

LOL there's no such thing as an MSP that has never had a vac leak.

i wonder if there has been one (uhm) haha who am i kidding of course there has not been one haha

 

[msptn03]

The 2000 626 mani is the one you want.

Also, to you guys that are reporting higher numbers.. do you have stock manifolds?

yea ive got a stocker in there. but iam looking for a 626. so far none of the salvage places around have any. might have to drive to another county jus to get one. but it sounds like it would be worth it

 

[mightyray]

its a never ending chase. i find and fix one just to find out a day later its a new one (dunno) oh well

Well damn. I replaced some of the main vacuum lines that I thought might be a problem (WGA and all lines around the joep boost controller) but to no avail. How does one go about chasing a vacuum leak? I've heard the OEM BPV tends to leak. How could I test that?

 

[MSP2024]

Well damn. I replaced some of the main vacuum lines that I thought might be a problem (WGA and all lines around the joep boost controller) but to no avail. How does one go about chasing a vacuum leak? I've heard the OEM BPV tends to leak. How could I test that?

have you checked your boost controller its self, i found out my turbox's is leaking

 

[mightyray]

Yeah, I just took it out and I still had the same leak. So here is my the setup all plugged in.

<a href="http://s7.photobucket.com/albums/y293/mightywrestler/?action=view&current=DSCF4581.jpg" target="_blank"><img src="http://i7.photobucket.com/albums/y293/mightywrestler/DSCF4581.jpg" border="0" alt="Photobucket"></a>

When I unplug the vac gauge on one side and plug it up like in the below picture their is no change in vac pressure (still -.70). But if I let go and let it remain unplugged the vac pressure goes to -.20 like its supposed to be. Does anyone know where i should look for a leak now?

<a href="http://s7.photobucket.com/albums/y293/mightywrestler/?action=view&current=DSCF4583.jpg" target="_blank"><img src="http://i7.photobucket.com/albums/y293/mightywrestler/DSCF4583.jpg" border="0" alt="Photobucket"></a>

Also does anyone know if this open pipe is supposed to connect to anything or is it supposed to open.

<a href="http://s7.photobucket.com/albums/y293/mightywrestler/?action=view&current=DSCF4580.jpg" target="_blank"><img src="http://i7.photobucket.com/albums/y293/mightywrestler/DSCF4580.jpg" border="0" alt="Photobucket"></a>

 

[KrayzieFox]

Uhhh.. you just have a random unplugged vacuum hose sitting there?

 

[SeR_Cyclops]

you should not have a open hose.

 

[KrayzieFox]

That's pretty much the definition of a vacuum leak.. a pretty big one too.

 

[mightyray]

Well does anyone know where it goes? That is on the back of the Intake Manifold. Also the vac gauge doesn't change if I put my thumb over it.

 

[KrayzieFox]

So it's not actually sucking in any air through that hose? It's just a hose hooked up to a dead end?

 

[hollar1211]

that hose looks like part of the joeP fuel pressure regulator kit, it should be attached to the air intake. you could leave it open, but it's recommended by joe himself to be plugged into the intake. get a longer piece of hose and a nipple, and tie it in to your intake piping. there might already be a nipple on the underside of the intake piping if this was installed by a previous owner. make sure the arrow on the check valve (the white plug between the hoses) is pointing in the direction of the intake, away from that little red hose. it was designed to lean out the fuel a little and help with hesitation.

 

[ND4MSP]

That was probably going to a boost gauge at one time. I tapped that line for mine. If your not going to use that source just put a fresh hose on there.

 

[mightyray]

So I decided to update you all on my "leak." I have the Blitz Dual Turbo timer/boost gauge and it reads in bar. I did some research online and I see that most of you have a boost/vacuum gauge that reads boost in psi and vacuum in inHg. I have been totally off with my units and I actually have good numbers when I convert to inHg. I'm at about 800ft AGL and I'm reading around 23inHg when it's warmed up so it looks like I never really had a leak. At least my engine bay looks a little nicer with silicone hoses.

 

[orng1]

23 is good, that's what I had before. I don't drive the car a lot lately and it'll go down to 8-9 then gradually back up to around 20. If I drive it every day it's around 22 or a little higher.