2nd Generation Specific (1986-1992) 1986-1992 Discussion including performance modifications and technical support sections.

vacuum line question

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Old Oct 16, 2006 | 08:25 PM
  #1  
Mazdax605's Avatar
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79 GS,74 RE/PU
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vacuum line question

Hey guys,

bear with me here,I am a lowly 1st gen owner helping a friend out swapping an engine in his 2nd gen.We neglected to mark every vacuum line on the engine,and now we have one that we are not sure where it goes,and the Hayes manual is little help.

On the dynamic chamber in the front near the TPS the are a stack of three vacuum lines with a larger one on top that goes to the vacuum line spider,and the middle one(we think it is the middle atleast) is the one we can't seem to figure out where it goes.Any help on this would be appreciated.

Chris
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Old Oct 16, 2006 | 08:59 PM
  #2  
NZ_87_TURBO's Avatar
long live the monster BP
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From: New Zealand
what series? turbo? NA?
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Old Oct 16, 2006 | 09:22 PM
  #3  
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79 GS,74 RE/PU
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From: Massachusetts
Oh yeah I am sorry.It is an 87 S4 Non-turbo.
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Old Oct 16, 2006 | 09:50 PM
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HAILERS
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Top big one goes to the spider.

Next one goes to the primary fuel injector Air Bleed b/t the two oil injectors. I'm talking the two oil injectors on the INTAKE manifold, below the dynamic chamber.

Bottom goes to the vacuum rack.

Last edited by HAILERS; Oct 16, 2006 at 10:01 PM.
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Old Oct 17, 2006 | 12:34 PM
  #5  
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79 GS,74 RE/PU
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From: Massachusetts
Thanks Hailers,

I went out this morning,and found the barb on the intake that the line attaches to,but while I was routing the line toward there I knocked a hose from the vacuum spider off of the block,and when I attempted to put it back on it seemed very brittle,and cracked some while I was installing it.Now I know Mazdatrix sells the vacuum spider,but we are up against the clock here,and just want to get it running for an event this weekend.Could we use some regular vacuum line to replace this short(maybe 3 inch) length of hose from the vacuum spider?Thanks again,and I will hit you guys up if we have more questions.

Chris
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Old Oct 17, 2006 | 12:42 PM
  #6  
stevej88na's Avatar
Strength and Honor
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From: CA bay area
Yep, in fact many go pure silicone anyway.
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