[s-cars] Vacuum leak

Sat Dec 12 08:48:51 PST 2009

Well the motor sounds real good. Compression perfect. The valves and  
lifters sound like shit. My reasoning for the o34 is I've heard  
nothing but good things about their coils and will be running it on a  
chipped program until late January. Vems is going in. I have a burns  
shorty collector on order and will be making a t3 flanged mani with my  
welder buddy to bolt
lt up to a holset hx35 or he351cw. Whichever pops up in his desiel  
shop first. Build the head throw some studs and a gasket in it. Than  
boosting the shit out of it. Should be fun and get me going fast for  
less than 5k.

Sent from my iPhone

On Dec 12, 2009, at 8:27 AM, Michael Lardizabal <mikellardizabal at yahoo.com 
 > wrote:

> Cory-
>
> I'm going to echo what Bob and Dawson said.
>
> The moisture trap is one of the biggest culprits for boost loss. I  
> would start there, then a pressure test. I doubt there's anything  
> wrong w/ your MAF . Once that particular Bosch unit goes  
> bad.....you'll most definitely know it....your symptoms aren't  
> indicative of that.
>
> Once you get your car sorted out you're going to love having VEMS. I  
> had it in my last RS2'd car. , and will have it in my new S6 project  
> car as well.
>
> Out of curiousity, why didn't you get the EFIXpress HO coil set up  
> w/ your VEMS ?> Marc's system rocks ! and he probably would've given  
> you a smokin' deal ?
>
> Cheers!
>
> Mike
>
> PS- Just make sure your car is at a proper Stage 0 before you throw  
> any bling or shiny go fast parts at it . High boost will empty your  
> wallet faster than a hiccup if you're doing band-aid fixes.
>
> --- On Sat, 12/12/09, Cory Pio <cpio921 at gmail.com> wrote:
>
> From: Cory Pio <cpio921 at gmail.com>
> Subject: Re: [s-cars] Vacuum leak
> To: "Douglas Landaeta" <dlandaeta at gmail.com>, "s-car- 
> list at audifans.com" <s-car-list at audifans.com>
> Cc: "s-car-list at audifans.com" <s-car-list at audifans.com>
> Date: Saturday, December 12, 2009, 2:15 AM
>
> Thanks for the responses guys I'm going to try some nice parts at it
> this week and report backk
>
> Hope everyones having fun boosting around in the dense air
>
> Sent from my iPhone
>
> On Dec 12, 2009, at 2:04 AM, Douglas Landaeta <dlandaeta at gmail.com>
> wrote:
>
> > Cory,
> > I've got a new 710 valve sitting on the shelf here. Let me know if
> > you need it.
> > Doug
> >
> > On Sat, Dec 12, 2009 at 1:04 AM, Cory Pio <cpio921 at gmail.com> wrote:
> > I guess I'm asking is it possible my wastegate or bpv are hesitating
> > to shut quickly on off throttle because of a vacuum leak?
> >
> > Sent from my iPhone
> >
> > On Dec 12, 2009, at 12:57 AM, Robert Myers <bob at chips-ur-s.com>  
> wrote:
> >
> > > *This message was transferred with a trial version of CommuniGate 
> (r)
> > > Pro*
> > >
> > >
> > > Cory,
> > >
> > > If you hear air escaping --- YOU HAVE A LEAK!  Period.  You simply
> > > must find it and fix it or the car won't run worth crap until you
> > > do.  Yeah, finding a leak isn't glamorous but you simply have to  
> do
> > > it or you're just pissing into the wind.
> > >
> > > Bob
> > >
> > >
> > >
> > >
> > > At 12:49 AM 12/12/2009, Cory Pio wrote:
> > >> *This message was transferred with a trial version of CommuniGate
> > >> (r) Pro*
> > >> Yeah I'm thinking it could be my retarded intake setup Inherited
> > from
> > >> the PO. I'm getting a fuel trim code adaptation limit exceded. I
> > >> already replaced the plugs and fuel filter. I have HO coils
> > coming in
> > >> from 034. I'm thinking of just switching to a 1.8 bar spring
> > >> getting a
> > >> bpv and going with vems ecu to get rid of the maf which seems  
> to be
> > >> tied into my n75 valve. Hopefully going big turbo and redoing
> > alot of
> > >> stuff this problem will go away. Just tedious annoying things  
> like
> > >> vacuum leaks piss me off when troubleshooting in the freezing
> > cold. I
> > >> rather be bolting in some shinny new parts. The wastegate or  
> bpv is
> > >> de
> > >> staying open when I give little throttle.
> > >>
> > >> Or for a better example when I get into boost and let off  
> throttle
> > >> boost goes bye. Well when I get back into it at higher rpm it
> > hardly
> > >> comes out of vacuum and I can still here air escaping. Hmmmmmm
> > >>
> > >> Sent from my iPhone
> > >>
> > >> On Dec 11, 2009, at 9:57 PM, Robert Myers <bob at chips-ur-s.com>
> > wrote:
> > >>
> > >>> *This message was transferred with a trial version of  
> CommuniGate
> > (r)
> > >>> Pro*
> > >>>
> > >>> The "vacuum pump" under the rear seat operates the pneumatic
> > locking
> > >>> system and has nothing to do with your boost or lack thereof.
> > >>>
> > >>> If I read your complaint correctly I think you are complaining
> > that
> > >>> your engine is showing turbo lag.  This is 100% normal for a
> > >>> turbocharged engine,  If boost is not coming on as early as it
> > used
> > >>> to and/or it isn't getting as high as it used to then you may  
> well
> > >>> have a leak in the induction system.  There are several cute
> > tricks
> > >>> to locate such leaks.  Some work in one case but not in others.
> > >>>
> > >>> If you have a leak while idling (the leak is open at low
> > pressures)
> > >>> try spraying ether based starter fluid over the plumbing while  
> the
> > >>> engine is idling.  If ether hits the leak some of it will be  
> drawn
> > >>> into the system and the engine rpms will pick up.  This can help
> > >>> find such a leak.
> > >>>
> > >>> You can construct a simple gadget from a 4-6" piece of 3" PVC
> > pipe,
> > >>> a 3" cap, some PVC glue, and a tire valve.  Use this gadget and
> > some
> > >>> shop air to pressurize your induction system to perhaps 7-10  
> psig.
> > >>> Listen for a hiss sound from the plumbing and track it down.
> > >>>
> > >>> Of course if you have a BIG leak you can't get enough air in the
> > >>> system to inflate it even a little.  Start looking for likely
> > >>> leaks.  The very first place to look is the Michelin Man hose
> > (from
> > >>> the crossover pipe to the intercooler inlet) and closely inspect
> > it
> > >>> for leaks - take it out and flex/bend/twist/etc to expose and
> > >>> potential leak. if it isn't there then do the same with other
> > >>> portions of the system.
> > >>>
> > >>> Do not ignore the small tubing connected to the water trap.
> > Earlier
> > >>> s-cars look for the trap high on the engine side of the firewall
> > >>> near the rear of the engine.  It is a little larger than a 35mm
> > film
> > >>> cannister.  Later models have the trap located under the carpet
> > near
> > >>> the ECU.  Trace the MAP hose back from the ECU to find the trap.
> > >>>
> > >>> Bob
> > >>>
> > >>>
> > >>> At 09:36 PM 12/11/2009, you wrote:
> > >>>> *This message was transferred with a trial version of  
> CommuniGate
> > >>>> (r) Pro*
> > >>>> Alright guys
> > >>>>
> > >>>> Im thinking a vacuum leak might be giving me wastegate/ bpv
> > >>>> problems. My car pulls about -15 hg in.  When fully warmed  
> up. It
> > >>>> used
> > >>>> to do 20. So my question is my car locking system and the  
> vacuum
> > >>>> pump
> > >>>> under my rear seat a good place to start looking for leaks?
> > >>>>
> > >>>> My symptoms are my car doesn't go into boost right away . The
> > >>>> wastegate or bpv seems to be staying open unless you really get
> > on
> > >>>> it.
> > >>>> Any help would be much appreciated.
> > >>>>
> > >>>> Thank you
> > >>>> Cory pio
> > >>>> _______________________________________________
> > >>>> S-CAR-List mailing list
> > >>>> http://audifans.com/mailman/listinfo/s-car-list
> > >>>> http://www.audifans.com/kb/List_information
> > >
> > _______________________________________________
> > S-CAR-List mailing list
> > http://audifans.com/mailman/listinfo/s-car-list
> > http://www.audifans.com/kb/List_information
> >
> _______________________________________________
> S-CAR-List mailing list
> http://audifans.com/mailman/listinfo/s-car-list
> http://www.audifans.com/kb/List_information
>