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Discussion Starter · #1 · (Edited)
Anyone ever experienced too much vacuum. My 05 mustang makes a weird intermitten noise... but when I take off the oil cap the noise goes away. The cap is sucked in with lots of vacuum. If I put my had over where the oil cap goes I feel my skin being pulled slowly more and more.


What is happening... The last thing I had done was a valve cover swap for dressed up Chicane intake covers...

could something have been done wrong here.????
 

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make shure 1 valve cover is vented the the intake tube and not blocked by???
 

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Discussion Starter · #5 ·
I also had a tune and CAI added by Saleen / JDM

Could a bad tune also leave the car needing more air and making it suck air where ever possible???

Or is that air / vacuum different.
 

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1965 Mustang coupe
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Could a bad tune also leave the car needing more air and making it suck air where ever possible???

Or is that air / vacuum different.
I doubt it's the tune especially since you noticed it after the valve cover swap. Do you have your PCV hookup connected properly??
 

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Yah, probably the PCV.

One hose needs to be hooked up to your intake manifold. The other typically is somewhere after your MAF and before your throttle body.

Is the second one not hooked up?
 

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Discussion Starter · #8 ·
Saleen Extreme Inlet tube was the issue

thanks... Problem solved.

The inlet tube had a nipple that was plugged.

Drilled thru it and problem was solved.

Thanks guys!
 

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Discussion Starter · #10 ·
manufactuing defect on the extreme inlet tube

There was melted plastic covering the inside of the inlet tube on the nipple. So while the vent hose connected... it was not letting the car breath... It was causing a screeching sound that came and went once the car developed some crankcase pressure. Thankfully it was an easy thing to fix.

Thanks to Ricardo from GTR hipo... He quickly found the issue.


Saved me some cash!!! :nogrinner
 
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