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View Full Version : Dont kill me...... vacuum question

gabefromcali
10-12-2019, 06:33 AM
For the life of me I cannot figure out where this vacuum line leads to. Its right next to the IACV. Does anyone know where this goes?

https://i13.photobucket.com/albums/a261/volcom101_/8724C37C-BE71-4BD7-A5F5-BD401A6F17FB.jpeg (http://s13.photobucket.com/user/volcom101_/media/8724C37C-BE71-4BD7-A5F5-BD401A6F17FB.jpeg.html)

Also this guy? Its coming from right next to the throttle body


https://i13.photobucket.com/albums/a261/volcom101_/CAE685EB-6647-4D2C-B9D6-28E266536377.jpeg (http://s13.photobucket.com/user/volcom101_/media/CAE685EB-6647-4D2C-B9D6-28E266536377.jpeg.html)

I tried searching around but couldnt specifically find where these went. Any help is much appreciated
5280VertDET
10-12-2019, 09:34 AM
If you cap both, hows it run? I think they are Cruise control related.
kyral
10-12-2019, 12:03 PM
im pretty sure the top one goes to the fuel pressure regulator
gabefromcali
10-12-2019, 04:59 PM
If the one in the top image is capped it seems to bump the idle up just a tick, maybe 2-300 rpm or so. The one in the lower image does nothing when capped.

Sorry I didnt mention but its a 97 ka24de if that makes any difference. All stock just has an aftermarket intake
Pacman
10-12-2019, 06:48 PM
The second one is supposed to connect to the intake just before the throttle body. I'm unsure what it does, it's dark out now.

The first I believe is fuel regulator vacuum, as previously stated.
gabefromcali
10-13-2019, 11:26 AM
Ok cool thanks guys. I’ll check soon as I’m home
gabefromcali
10-13-2019, 04:58 PM
Woohoo idle issue fixed!! Thanks a bunch!!

Also, yes the vacuum line near the IACV did go to the fuel pressure regulator, for anyone in the future thats having the same issue.
kennedy8383
10-14-2019, 08:24 PM
im pretty sure the top one goes to the fuel pressure regulator


Correct. Don't forget to clamp it so it doesn't pop out.
S14rebuild
10-15-2019, 01:43 PM
Correct. Don't forget to clamp it so it doesn't pop out.

Why would it pop off? Its under vacuum...
kyral
10-15-2019, 02:55 PM
Why would it pop off? Its under vacuum...

its for a boosted motor, so they dont pop off, but like you said its under vacuum on a NA
jedi03
10-17-2019, 10:04 AM
yup...I forgot about boost on recent build and was wondering what loud whistling was a few days later lol