Missing vacuum line

zppln96 · Post by **zppln96** » Sun Apr 01, 2007 10:15 pm

Can anyone tell me where the vacuum line is supposed to go that comes off of the left side of the intake plenum?

Jeff P · Post by **Jeff P** » Mon Apr 02, 2007 10:36 am

If you're talking '87-93 2.8/3.1L V6 and you mean the left side as you're facing the engine bay (I'm assuming a lot here), the vacuum line heads under the coolant reservoir to the charcoal canister. If you're talking a '96 car (guessing by your screenname) or any other year/engine, I haven't the slightest.

zppln96 · Post by **zppln96** » Mon Apr 02, 2007 9:11 pm

Well its actually the 1994 Base Beretta with the 3.1 V6. I guess it goes to a canister under the battery?

94beretta · Post by **94beretta** » Tue Apr 03, 2007 12:06 am

((((( if by left you mean side closest to the front of the engine bay, if looking at the engine from the front of car to the left of the plenum would be the power steering pump,just to be on the same page))))) i also have a 94 3x00 v6

anyway to answer your ? it goes from the intake plenum to the vacumm modulator on the front of the tranny from there it goes to the round canister(i forget what its called"purge canister"maybe) from there it goes under the battery tray up the fender and splits in two,one goes to the cruise control unit monted on the firewall and the other goes through the firewall into the dash,which im assuming goes to the heater controls

zppln96 · Post by **zppln96** » Tue Apr 03, 2007 8:47 am

Yeah, I need the one for the heating controls. I lost all control over them. They just like to shoot out of the vents and not change to the defrosters or floor. So I need to find the vacuum line to control the mode doors.

Post by **Cliff8928** » Tue Apr 03, 2007 12:41 pm

The one for the heater controls goes all the way around the drivers side of the car to just under the battery.

zppln96 · Post by **zppln96** » Tue Apr 03, 2007 10:06 pm

Alright and it comes from where? Sorry i'm asking so many questions.

Post by **Cliff8928** » Wed Apr 04, 2007 12:34 am

The line on the front of the engine leads down towards the vacuum modulator on the trans. That line has a tee fitting in it and splices into a vacuum reservoir and the line for the HVAC controls. The HVAC control line then follows the perimeter of the engine bay and goes inside the wiring harness into the cabin on the passenger side bulkhead.

zppln96 · Post by **zppln96** » Wed Apr 04, 2007 7:46 am

Alright, thank you. I'll have a look at this when I get out of school. Had to drive without my fan belt hooked up this morning. Something strange happened with that. I had to drive without my fan belt hooked up today. It was around everything just right but it was loose, like the belt tensioner wasn't doing it's job.

Post by **heavywoody** » Wed Apr 04, 2007 12:34 pm

Fan belts? We have fan belts?

zppln96 · Post by **zppln96** » Wed Apr 04, 2007 4:08 pm

Well, the serpentine belt. You knew what I meant i hope.

rweatherford · Post by **rweatherford** » Wed Apr 04, 2007 8:54 pm

I wouldn't do that with a V-6. You won't have an engine for very long.

zppln96 · Post by **zppln96** » Wed Apr 04, 2007 10:52 pm

Yeah it's all back together and functioning right.

jtcoolhands · Post by **jtcoolhands** » Thu Aug 09, 2007 10:24 pm

That Vacuum line that is capped does it serve a purpose to any other part of the engine or pumps?

Post by **Cliff8928** » Fri Aug 10, 2007 12:31 am

I've never seen that vacuum port used on any 3100 or 3400 from the factory.

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