[s-cars] Vacuum leak

[Robert Myers]

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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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