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2g Help! Knocking noise, high vacuum.idle weird

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Crawl

15+ Year Contributor
325
2
Jan 8, 2005
portland, Maine
Ok, to start this is kind of a long story so I appreciate those who are willing to read all this and help me out, i am really struggeling here.

I installed a new alternator, an intake pipe, an MBC, and a boost gauge and my life has been hell sense.

Now between 2-3k i can hear a faint whine, high pitched.

After 3500 if i give it a little more gas I can hear what I can only describe as... a knocking noise, very low tone.

No matter weather I screw the MBC in all the way in or all the way out, i hit about 12psi, checked the MBC for leaks and its fine. I assume my BOV sucks at life and ordered a new one, that comes monday with new UICP.

At idle my car is getting around 25/27 Vacuum


Ok here is the longer part thats really annoying. After i installed the intake pipe my car started stalling, if i revved it past 3k and pushed in the clutch the car would just idle right down to about 0 and stall out. Tried a billion things finally put back in the stock intake tube and stalling stopped (wtf?) so I thought ok maybe this pipe isnt quite right for my car. So I remembered the Dump Tube cut mod, cut off the dump tube and put it back in, sealed it and car started staling again.... im like ok maybe i didnt seal it well enough, take it back out make sure its perfectly sealed and dried, try again... still stalling. Someone else mentioned that they had this problem until they replaced there BOV, i dont see how more air through the intake and BOV could be related to stalling, but hey, My new BOV comes monday so maybe that will fix it, but what made me really frustrated is I go to Home Depot, pick up a 6" piece of 1" PVC and shove it into the intake seal it up, hook it up, car stops stalling. Its still dieing down to around as low as 300-350 at times , but its not stalling so its a temp fix until monday.

However, I still get that high pitched whine (not really loud, but i hear the noise often from cheesy small engine hyndais and Geo's, like a remote control car LOL) , and I am still getting that weird noise after 3500.


Ok I did a little more searching and saw some people mentioning the transmission can make this knocking sound, Recently when I was installing the alternator I saw the bottom of... (pardon noobness) what i believe to be my transmission, and it was soaked in fluid, it wasnt oil but it hought it was coolant from when i flushed it the other day, but I just realized I had a tranny leak a few months back that i thought I had fixed and Im wondering if it came back and now my tranny is shittin out on me :(
 
Well I will take a crack at it, if you got a new intake tube than the whining noise is probably your turbo spooling up as heard through the metal pipe, mine does that too. As for the stalling, check your MAF sensor plug and all the intake and vacuum lines for leaks, sometimes I mess around with the intake and forget a hose or don't plug the maf back in. The knockong sound, hmmm I dont know I would need more specifics. Good luck!
 
Did you remember to put on the recirculating hose? (The short hose that goes from the BOV to the intake) :thumb: :talon:
 
I hear the whining noise and I have the stock rubber intake in :(

MAF is plugged in, when its unplugged my car will barely idle sittingstill LOL, the BOV recirc tube is perfect, hell this problem stemmed from cutting off the tube LOL. But Its perfectly sealed no leaks.

Also think on this, it worked perfect with the stock intake tube , All i did was pull out the dumb tube, cut it short, put it back in perfectly sealed, and the car started stalling <--- wtf?
 
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