i have an odd issue, and i thought maybe one of you out there could help me diagnose the problem..

when i turn off engine engine i hear a release of air coming from the engine, it sounds like a vacuume line to me (im a IT geek...not a mechanic)

i know this description is a bit vague but it's really hard to explain the sound...

stock 3800 with K&N CAI...thanks ahead of time for your reply's!

 

Hey, I'm an IT Geek/Non-mechanic (but learning) too from the Cincy area (Indiana-side.... living in the gulf coast now). This really isn't an answer response so much as a 'Hi!'. (love the avatar, btw)

I had a Maxima that I had the vacuum tube on the wrong connector (Injen intake) and when I turned the car off, it would whine like hot metal cooling or something. Put it on the correct tube and it stopped. Not sure if it's the same since you said yours sounds like air escaping, but...

 

here is a short video of the issue.


YouTube - Possible vacuum leak

 

hey nichols2k,

it's always good to see local people on here, if im not mistaken we have a few members from this area!

good to meet you, and thanks for your input!

 

anyone else care to take a stab?

 

SOMEONE has to at least have an educated guess...im trying not to randomly replace parts, it's too expensive...

 

so...i tried a seafoam treatment...i sent an entire bottle through the vac line on the brake booster..let it sit for 10 minutes and started her up...i got a small bit of smoke from the exhaust, but not much...

is this good or bad?

 

thanks for all the great feedback...

 

I have the same sound coming from the drivers side. sounds like from under the booster. Allso I have no peresure in the gas tank when I remove the cap. Car will not pass inspection! I'm looking at replacing the canister!!
any help guys would be outstanding!

 

Sorry for the very late reply. Yes your problem sounds like a vac leak and how you would test and see if it is and to help locate it is....when the car is running to spray "Starting Fluid" in one area of vac lines and then move to another. If you spray in an area where there is a vac leak the car's rpm will jump. That will let you figure out if and where the vac leak is.

As for fuel pressure...I really don't know...could be the gas cap or something more serious.