Vacuum lines around intake manifold

ca91mkIII

New Member
May 23, 2012
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Franklin
Any chance someone would be kind enough to post some good pictures of the vacuum lines running around the intake manifold on a 91 7M-GTE? I have found numerous pictures of the lines on the bottom side but nothing really on the top side and then showing where the lines snake around the manifold. I have deleted the egr valve, so I am trying to figure out what lines I can get rid of and/or cap off. Thanks in advance.
 

Dirgle

Conjurer of Boost
Mar 30, 2005
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Pauma Valley, CA
ca91mkIII;1946590 said:
I have deleted the egr valve, so I am trying to figure out what lines I can get rid of and/or cap off.

Umm. None. Every line on there has a purpose, including the EGR valve. This isn't some american car out of the early 80's late 70's, with a crap ton of power robbing emissions hardware. Pulling stuff without knowing what it does, and compensating for its absence in the system is a recipe for damage. Even the EGR, the ECU is tuned for it. Removing it throws that tune off.

vacuum_2h.gif
 

IndigoMKII

New Member
May 9, 2011
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Madison, Virginia
ca91mkIII;1946590 said:
Any chance someone would be kind enough to post some good pictures of the vacuum lines running around the intake manifold on a 91 7M-GTE? I have found numerous pictures of the lines on the bottom side but nothing really on the top side and then showing where the lines snake around the manifold. I have deleted the egr valve, so I am trying to figure out what lines I can get rid of and/or cap off. Thanks in advance.

Removing EGR actually hurts MPG and performance at part throttle. At WOT, EGR is deactivated thus not hurting performance. It also keeps the back cylinders cooler and the EGT's down. Removing EGR on these cars is possibly the worst thing you can do to a DD IMO. Unless you make the steps to properly remove it.