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vacuum advance question


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#1 seanc77339

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Posted 23 August 2011 - 09:04 PM

1. What happens if you block off the farthest and the second farthest nipple on the TB of an 1987 flat-body conquest while leaving only the first one close to the firewall still stock and connected??

SC :ph34r:





#2 Indiana

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Posted 24 August 2011 - 01:22 AM

Nothing, most do that anyway.

#3 Caliber308

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Posted 24 August 2011 - 01:48 PM

First port on the Throttle body towards the front of the car is:
Distributor Advance Control Vacuum. (Nipple D) DO NOT REMOVE OR CAP THIS PORT.

The Second port is:
EGR Valve Control Vacuum. (Nipple E)

The third port is:
Secondary Air Control Vacuum. ( Nipple M)

If you still have the second (Nipple E) and third port (Nipple M) active.Removing the vacuum lines can wreck havoc on you entire system.

Bill

Edited by Caliber308, 24 August 2011 - 02:06 PM.

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#4 MikeMeyerhoff

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Posted 24 August 2011 - 07:25 PM

Here is an understandable explanation of the vac system.

http://www.starquest...l=&fromsearch=1

Just disconnecting those lines and leaving everything else might cause some problems with the EGR.  You'll need to also cap both blue line feeds to the EGR
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#5 seanc77339

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Posted 24 August 2011 - 07:43 PM

I was wondering how is this gentleman at:

http://www.cardomain...subishi-starion

Is running his vacuum lines. I like how it is so clean in his engine bay.

Any ideas on how he has accomplished this would be appreciated.

Thanks,
SC :ph34r:

#6 seanc77339

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Posted 24 August 2011 - 10:29 PM

I have removed my secondary air cleaner. What is the purpose of the Purge control valve??

THanks again,
SC :ph34r:




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