[s-cars] Vacuum leak

[Cory Pio]

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
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>