Vaccum

Does anyone know the vaccum on a stock 1993 5.0/Cobra?

I'm getting a consistent 15, which I assume is good, but there's definitely a leak as the car "exhales" when I turn it off. I can't find the leak for the life of me, but it has to be an accessory.

How do I reconcile 15 with the exhale?

Thanks guys.

Brad

Is the car running bad? If it isn't then the leak is small or there
mihjt not be a leak at all. In the old days one could find a leak by
spraying starter fluid at various points and when the leak was sprayed
the engine would surge. Maybe the power assist unit for the brakes has
an issue. Have someone else start the car and then you stay outside and
listen for the location of the exhale when it is turned off.

Brad and Karen wrote:
> Does anyone know the vaccum on a stock 1993 5.0/Cobra?
>
> I'm getting a consistent 15, which I assume is good, but there's
> definitely a leak as the car "exhales" when I turn it off. I can't find
> the leak for the life of me, but it has to be an accessory.
>
> How do I reconcile 15 with the exhale?
>
> Thanks guys.
>
> Brad
>

"Brad and Karen" > wrote in
news:_%bnk.122096$kx.44651@pd7urf3no:

First of all, adjust your newsreader to 76 lines, and don't try to use HTML
on Usenet.

Second, it's vacuum. Weird spelled word. I work in a vacuum repair shop, so
I'm tuned into it.

All I've read is that it should be at least 20 at idle. Who knows what
computer issues have been introduced?

I don't think that a vacuum reading is worth much with a computerized
system in place, because we don't know what it's doing, when it's doing,
and why. It's better to read the codes.

I get 20 to 30 range. 15 not good enough IMHO.

Check the gas fume canester rubber elbow, passenger side up front next to
radiator, on the frame rail.
Shaped like an L has two different sizes in and out, carbonized rubber part
It gets bigger with time and cracks and can fall off, I had to replace with
rubber hose. There is no replacement for it, that I have found.
Let us know what you find out



"Brad and Karen" > wrote in message
news:_%bnk.122096$kx.44651@pd7urf3no...
Does anyone know the vaccum on a stock 1993 5.0/Cobra?

I'm getting a consistent 15, which I assume is good, but there's definitely
a leak as the car "exhales" when I turn it off. I can't find the leak for
the life of me, but it has to be an accessory.

How do I reconcile 15 with the exhale?

Thanks guys.

Brad

Engine vacuum is a relative thing.... IIRC, you are in Calgary which is about 3500 feet. This makes 15 in/Hg at idle pretty good.... (you are also going to be interested in anything that the gauge is doing - pulsing, nosing over, anything...). Those closer to sea level will see idle vacuum closer to 18~20 inches. 30 inches Hg is considered "perfect" vacuum.... ain't gonna happen in the intake manifold...

Even though this car is computer controlled , the basics still apply.... "suck - squeeze - bang - blow"... vacuum gauges, compression testers and the whole nine yards are still very important tools... If a sensor reading isn't outside the "window", there probably wont be a code but there could still be a problem....

Even though this has been an on going concern and you have described it a few times, I'm still having trouble correlating "exhales".... this is one of those things I wish I could here at least once....

I am assuming that you tried locating the noise with a piece of hose and it didn't help? Let's grasp at a few straws, then.... try letting the car idle.... with it running, remove the oil filler cap. Does it come off normally? With the oil filler cap off, turn the car off - does it still "exhale".

Just to refresh ones memory - the sound is definitely underhood? Other than this noise, no other symptoms exist?

Hmmm... a top posted over HTML reply.... Ooooh, I are bad.

"Brad and Karen" > wrote in message news:_%bnk.122096$kx.44651@pd7urf3no...
Does anyone know the vaccum on a stock 1993 5.0/Cobra?

I'm getting a consistent 15, which I assume is good, but there's definitely a leak as the car "exhales" when I turn it off. I can't find the leak for the life of me, but it has to be an accessory.

How do I reconcile 15 with the exhale?

Thanks guys.

Brad

> wrote in news:%nGnk.6221$nu6.5523@edtnps83:

>
> Hmmm... a top posted over HTML reply.... Ooooh, I are bad.

Which would be far less offensive if you'd fix your line length.

S'funny... in my reader, the lines wrap quite nicely.... Of all the people
on usenet, there is only one complaining of line length.... Everyone else is
wrong and you are right?

"elaich" > wrote in message ...
> > wrote in news:%nGnk.6221$nu6.5523@edtnps83:
>
>>
>> Hmmm... a top posted over HTML reply.... Ooooh, I are bad.
>
> Which would be far less offensive if you'd fix your line length.

wrote:
> S'funny... in my reader, the lines wrap quite nicely.... Of all the people
> on usenet, there is only one complaining of line length.... Everyone else is
> wrong and you are right?
>
> "elaich" > wrote in message ...
>> > wrote in news:%nGnk.6221$nu6.5523@edtnps83:
>>
>>> Hmmm... a top posted over HTML reply.... Ooooh, I are bad.
>> Which would be far less offensive if you'd fix your line length.
>
>

Line wrap this time is fine for me, but the top poast f's up the
quoting. Outbarf is good about that.

--


"Over here is a chance for a meal,
a young boobie. That's a bird..." - SurvivorMan

Top post - bottom post - middle post - posts made by making points.... Some
of you guys are totally ****ed... and I am surprised you are allowed to
vote....

Please... PLEASE!!!! Make me scroll down through umpteen dozen lines of ****
I have read 42 times already, just so I can see that some dork has said "me
too". If you top post, I will be ****ed off at what you say because it is
top posted.... If you bottom post, I wiull just be ****ed off at what you
have to say....

My news server has dropped a LOT of newsgroups.... partly because the
storage doesn't match the usage.... Trimming messages is a lost art....
getting ****y about where the reply is juxtaposed is a display of
manliness... (FWIW - getting ****y is a fag thing). If you would prefer that
this be bottom posted... look down - and then dare bitch at me....

Some of you guys are nucking futs....

"WindsorFox<SS>" > wrote in message
...
> wrote:
>> S'funny... in my reader, the lines wrap quite nicely.... Of all the
>> people
>> on usenet, there is only one complaining of line length.... Everyone else
>> is
>> wrong and you are right?
>>
>> "elaich" > wrote in message
>> ...
>>> > wrote in news:%nGnk.6221$nu6.5523@edtnps83:
>>>
>>>> Hmmm... a top posted over HTML reply.... Ooooh, I are bad.
>>> Which would be far less offensive if you'd fix your line length.
>>
>>
>
> Line wrap this time is fine for me, but the top poast f's up the
> quoting. Outbarf is good about that.
>
> --
>
>
> "Over here is a chance for a meal,
> a young boobie. That's a bird..." - SurvivorMan

Top post - bottom post - middle post - posts made by making points.... Some
of you guys are totally ****ed... and I am surprised you are allowed to
vote....

Please... PLEASE!!!! Make me scroll down through umpteen dozen lines of ****
I have read 42 times already, just so I can see that some dork has said "me
too". If you top post, I will be ****ed off at what you say because it is
top posted.... If you bottom post, I wiull just be ****ed off at what you
have to say....

My news server has dropped a LOT of newsgroups.... partly because the
storage doesn't match the usage.... Trimming messages is a lost art....
getting ****y about where the reply is juxtaposed is a display of
manliness... (FWIW - getting ****y is a fag thing). If you would prefer that
this be bottom posted... look down - and then dare bitch at me....

Some of you guys are nucking futs....

Hey Mechanic.

I haven't been around for a few days... sorry. Getting married. She's practically wearing a new Mustang on her finger and the freaking band alone would have bought me a supercharger... oh well.

So, I took off the oil cap today. It's a rubber push-in type... lots of suction there, while the engine is running and right after I turned it off. Is that bad? I forgot to turn it off without the cap on...my bad.

The sound is just the weirdest... I've thought about this a lot and it's a constant sound when running, like - and this is close as I can come to it - like when you blow into a bottle... THAT sound! When you turn off the car it's like a high pitched hum for about 1 or 2 seconds that fades quickly and dies. It's so hard to explain.

Does any of that help?

I tried the pipe thing and that didn't work. Tried spraying water and that didn't work. Looked at the lines and everything under the hood and they all looked okay, but some are old and I'll replace them all this weekend.

I really do appreciate your time on this... it's so embarassing to have a bright red Cobra make funny noises...

Thanks again.

Brad

> wrote in message news:%nGnk.6221$nu6.5523@edtnps83...
Engine vacuum is a relative thing.... IIRC, you are in Calgary which is about 3500 feet. This makes 15 in/Hg at idle pretty good.... (you are also going to be interested in anything that the gauge is doing - pulsing, nosing over, anything...). Those closer to sea level will see idle vacuum closer to 18~20 inches. 30 inches Hg is considered "perfect" vacuum.... ain't gonna happen in the intake manifold...

Even though this car is computer controlled , the basics still apply.... "suck - squeeze - bang - blow"... vacuum gauges, compression testers and the whole nine yards are still very important tools... If a sensor reading isn't outside the "window", there probably wont be a code but there could still be a problem....

Even though this has been an on going concern and you have described it a few times, I'm still having trouble correlating "exhales".... this is one of those things I wish I could here at least once....

I am assuming that you tried locating the noise with a piece of hose and it didn't help? Let's grasp at a few straws, then.... try letting the car idle.... with it running, remove the oil filler cap. Does it come off normally? With the oil filler cap off, turn the car off - does it still "exhale".

Just to refresh ones memory - the sound is definitely underhood? Other than this noise, no other symptoms exist?

Hmmm... a top posted over HTML reply.... Ooooh, I are bad.

"Brad and Karen" > wrote in message news:_%bnk.122096$kx.44651@pd7urf3no...
Does anyone know the vaccum on a stock 1993 5.0/Cobra?

I'm getting a consistent 15, which I assume is good, but there's definitely a leak as the car "exhales" when I turn it off. I can't find the leak for the life of me, but it has to be an accessory.

How do I reconcile 15 with the exhale?

Thanks guys.

Brad