I have a 1998 Jetta. I now notice when I start the car I can here the SAI sound like a Vaccuum cleaner. There is a great amount of suction also on it. I have a small filter on the end of it. When I shut the car off it sounds like a Vaccuum cleaner when you turn it off. It takes a few seconds for the noise to go away. Does anyone have any idea why it is doing this?
P.s. I came across a few of the first threads you ever started, hard to believe its the same person
Give the noobs a break you were once a noob
Or the OP could just fix the SAI system. It is not bad and doesn't steal HP. It is there to help reduce emissions. Maybe the OP has emissions checks and no money for chips and plugs.
Apparently the SAI fan works. So that leaves the Combi valve, the solenoid valve and the vacuum lines. All of those have been covered in many threads.
I say search, read threads, and fix it.
There's always to sides of the coin:
On a forum like this, you get out what you put in is where I'm coming from.
OP didn't even bother to take a moment to even make a comprehensible title, let alone find the readily available threads that can help him.
Don't want to be mean, it's just guidance - take it or leave it.
With the amount of retards that buy cheap-ass MK3 with the sole intention to "slam that "dub" so it looks just like the abundance of MK3 at GTGs,
and then think of maintenance and come up in here and whine,
want information on how to fix their POS and want it NOW and even want YOU to fix their POS for free -
well threads like this happen and at some point one loses patience to spoon-feed them.
(Damn, that's a run-on!)
Sounds like your holding a grudge with your own kind, wisdom is infinite izzo.
It wouldnt kill you to share it
Back to the op, if youve got a filter coming off the sai your hearing the air being sucked into the pump. Its only purpose as previously stated is to inject air into the exhaust stream upon the first however long of idling. Its otherwise useless aside from the first few minutes that it runs.
Most people on here, myself included have deleted it with an sai plug and a chip. The chip will prevent you from throwing a code.
On the flip side if your tired of hearing the "vacuum cleaner" by the sound of how you described your setup id say remove the breather filter and hook the sai pump hose back up to your airbox