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Author Topic: Vacuum Line  (Read 1515 times)

Offline PandaManJon

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Vacuum Line
« on: 01:40:52 PM / 28-Oct-16 »
Was changing my Clutch Master Cylinder and found a vacuum line just sitting there under it. Not sure where it goes. I don't have my service manual with me right now so I can't really go to it. Anybody have any ideas?



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Offline CzechSilvia

Re: Vacuum Line
« Reply #1 on: 02:02:08 PM / 28-Oct-16 »
I don't think I have this on my car, which is more or less stock. But it doesn't have all the factory options so my guess is that it's something A/C related.
« Last Edit: 02:03:19 PM / 28-Oct-16 by CzechSilvia »
But what do I know? All I know about cars I learned from youtube...

Offline Cajun1guy

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Re: Vacuum Line
« Reply #2 on: 02:38:46 PM / 28-Oct-16 »
Man, you have a CLEAN compartment there! I second what our Czech said, my '84 turbo does not have that device.
« Last Edit: 02:39:21 PM / 28-Oct-16 by Cajun1guy »

Offline weitrhino

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Re: Vacuum Line
« Reply #3 on: 03:26:21 PM / 28-Oct-16 »
It doesn't exist on my 85 CA20 either.

Offline rednucleus

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Re: Vacuum Line
« Reply #4 on: 06:01:32 PM / 28-Oct-16 »
I think I have that on my 85 ca20; I will check later this eve. Almost 100% sure there's a pic in the fsm too.
Post Merge
Sorry, not on my 85. What year is your car?  That looks like something to do with emissions or idle control based on where the other vacuum lines are going. My guess is that metal stub should be going to the intake as a main vacuum source for that part. I would think you could hear a vac leak with that being unhooked.
Post Merge
http://www.nissanpartsdeal.com/parts-list/1987-nissan-200sx/engine-control-vacuum-piping.html?Diagram=223_F01
how about part #14956v
« Last Edit: 12:04:52 AM / 29-Oct-16 by rednucleus »

Offline PandaManJon

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Re: Vacuum Line
« Reply #5 on: 12:51:42 AM / 29-Oct-16 »
Thanks fellas for the quick response. I'm going to check it out and see if it connects somewhere along the intake like rednucleus suggested. It seems about right even though I haven't been able to hear a leak. I'll let y'all know tomorrow what I come up with.

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Offline PandaManJon

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Re: Vacuum Line
« Reply #6 on: 12:54:34 AM / 29-Oct-16 »
Man, you have a CLEAN compartment there! I second what our Czech said, my '84 turbo does not have that device.
Thanks man. I try to keep it clean. I think I may start a build thread even though I don't know whether or not I'm keeping the car just to document.

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Offline CzechSilvia

Re: Vacuum Line
« Reply #7 on: 12:58:47 AM / 29-Oct-16 »
I stand corrected, it's not A/C related. It appears to be a Mk2 thing that's why it's not in my car. According to the diagram it should connect somewhere between the turbo and air filter box.
But what do I know? All I know about cars I learned from youtube...

Offline PandaManJon

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Re: Vacuum Line
« Reply #8 on: 12:45:56 PM / 29-Oct-16 »
Yeah, it connected right before the air flow sensor. Thanks again guys.

 

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Offline rednucleus

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Re: Vacuum Line
« Reply #9 on: 01:11:46 PM / 29-Oct-16 »
So the $64 question is what the heck does the thing do?  Did you notice any change after you hooked the line up?

Offline CzechSilvia

Re: Vacuum Line
« Reply #10 on: 01:54:58 PM / 29-Oct-16 »
the line is obviously for dark magic circulation
But what do I know? All I know about cars I learned from youtube...

Offline PandaManJon

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Re: Vacuum Line
« Reply #11 on: 01:45:59 PM / 08-Nov-16 »
So the $64 question is what the heck does the thing do?  Did you notice any change after you hooked the line up?
I honestly have no idea. I just recently started driving the car about a day ago but it's been driving worst then before after doing the repairs.

Also with connecting that line, I just recently changed the P/S hi pressure hose, clutch slave and master cylinders, coolant line frome throttle to thermostat, #2 fuel Injector, PCV valve, and a vacuum line that connects to the B.P.T (exactly where I'm pointing at).

Now the car seems like it's struggling to get air and the turbo is constantly coming on even when I lightly push the accelerator (while driving, not while I move the throttle cable).

I'm more than certain that it has nothing to do with either of the cylinders, pressure line, and coolant line. Possibly injector, but doubtful.

I'm going to check for codes and from there, but if anyone has experienced any of these systems while possibly changing one of the the components I've changed, a little bit of direction would be greatly appreciated.



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Offline weitrhino

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Re: Vacuum Line
« Reply #12 on: 04:38:53 PM / 08-Nov-16 »
Yeah, pull the codes. In fact if it's been running poorly since before you did all that you might want to clear the codes and run the engine again. Obviously the clutch and steering work won't have effected the engine. Aside from the mystery vacuum line are all the other vacuum lines going to the right places?

Offline PandaManJon

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Re: Vacuum Line
« Reply #13 on: 02:51:57 PM / 17-Nov-16 »
Yeah, pull the codes. In fact if it's been running poorly since before you did all that you might want to clear the codes and run the engine again. Obviously the clutch and steering work won't have effected the engine. Aside from the mystery vacuum line are all the other vacuum lines going to the right places?

I check the codes and it shot out 12 (air flow circuit) and 13 (water temp sensor). And all the vacuum lines are all connected correcrly.

13 must have came from the car not warming up properly because my radiator didnt get hot when the car was running. I flushed the coolant and cleared the code and it's warmed up again like it's supposed to.

12 must have came up because of the inlet tube rubber seal kept coming off of the turbo while driving so extra air was coming in.

I've cleared the codes and been driving it for a couple days now. All seems right with it now. Thanks guys for the help.



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