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After installing the the PLIM last week, the car had been making this noise that I thought was the belt, then a pulley. & now think is a vacum problem.
Let me start by explaining the symptoms. When the car is cold it wont do nothing, then after a few minutes on the road the loud wine will start, but only when Im not accelerating, if Im on a light & the noise is bothering me I rev the car to about 2500 with the brakes on & the noise will stop.
Now the way I discovered that the problem wasnt coming from the pulleys, was that while the car was on I removed the oil cap & the noise stopped, & there is a strong suction in to the oil hole, at the same time when I took the oil cap off, a shake started like when there is a vacum leak. I put the cap back on & the engine is fine again but with the noise.
What did I mess up? Any ideas of where to look?

O-ring on your PCV valve

will check on it. thatks

people don't realize that little sucker there, till it starts to whine like yours does now

I also had a problem with my brake booster hose leaking and making the same noise.

I dont understand something, do we get more vacume with a PLIM?

Wow, you guys are amazing. Rigth on the money.

Why does this happen? Your problem exactly describes my squeeking belt issue! I have replaced every pulley on the motor and it still squeels everytime it warms up! I took off the oil cap and there was a LOT of suction. After the cap was off the squeel went away immediately.

The guys with intercoolers will also have the problem until the PCV system will gum up the port hole with oil/coating inside. mine did it, it was a loud whistle and like I said, after a build up it went away.
if you have suction on the oil cap then the PCV valve its self is messed up in one way or the other.. its very common.

make sure that o-ring is on the pcv!! :-)

sound like....http://s258.photobucket.com/albums/hh25 ... 0_0651.flv

Anyody got a pic? I saw no o-ring on my PCV. Mine is doing exactly that in the video except it isn't constant. More of a chirp chirp chirp sound to it. There is a TON of suction on the oil cap and the car almost dies when you take it off.

Can anybody explain how suction is produced in the valve cover when there is a leak in the PCV area.

I also need another MAP sensor. Mine is broken into two pieces held together by electrical tape. Anybody have one?

just snapped these for you....

PCV location with MAP sensor on top(I think)

PCV valve with o ring in place

O ring it self

great mine didnt come with a oring. Thanks for the pic! I see if I can find another map at the junkyard.

your old one had the O-ring you should of transferred over

post up in the wanted section wanting a MAP, someone might have a good one

aw man!

after a $30 AC clutch bearing
$20 belt
$10 aternator main bearing
& $25 idler pulley

my problem was solved by a $0.10 o-ring

hey, now you don't have to worry about those parts for a while!!

glad to hear your problem is fixed