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Very close to my dipstick I discovered a nipple for a vacuum line. I put a vacuum cap on it. I am wondering what is supposed to be connected there. Its right next to the dipstick. I can post a pic if needed.
Right behind the throttle body? That is the VFAD port. If you have a stock intake then it should not be capped. If you have an aftermarket intake then it should be capped. If it is the port more reward then it also is important and should have a green and white check valve on it and should be hooked up. Your car should idle like crap if it is not capped and should run like crap if disconnected if it is the line with the check valve on it.
Last edited by 9krpmrx8; Apr 27, 2015 at 05:03 PM.
It is not the vfad port. I'm not sure what was originally connected to it. Maybe it had a check valve, maybe not. It had always idled well. The vfad has a check valve and I can see another check valve back there, so I don't think that's it. It is literally right next to the dipstick. It is sort of below the throttle body. Pretty sure it isn't in this diagram.
that is not a vacuum port.
