Where do these go?
Thread Starter
Advanced
Joined: Mar 2009
Posts: 86
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From: Portland Oregon Vancouver WA
Where do these go?
On my 89' vert I replaced my injectors, polished the plenum/runners, and reassembled...well almost anyway. Can someone tell me where the items circled in blue and the hose indicated by the blue arrow all go?
Thank you in advance
Thank you in advance
Race Director
Joined: Apr 2002
Posts: 10,036
Likes: 346
From: Anaheim CA
In the second picture, the hose on the left goes on the fitting on the bottom of the throttle body.
The A.I.R. valves changed in 1989 and I have an '86, so mine doesn't look like yours. That said, there are two outputs from the A.I.R. valves. One goes to the exhaust manifolds and the other goes to a tube that goes back to the catalytic converter. The picture will give you an idea of what I'm talking about. The two A.I.R. check valves are below the oil filler cap here. The top one is the exhaust manifold and the bottom one is the catalytic converter tube. There is a metal tube that makes a connection to the driver's side exhaust manifold. You can also see the heater hose connected to the throttle body:
The A.I.R. valves changed in 1989 and I have an '86, so mine doesn't look like yours. That said, there are two outputs from the A.I.R. valves. One goes to the exhaust manifolds and the other goes to a tube that goes back to the catalytic converter. The picture will give you an idea of what I'm talking about. The two A.I.R. check valves are below the oil filler cap here. The top one is the exhaust manifold and the bottom one is the catalytic converter tube. There is a metal tube that makes a connection to the driver's side exhaust manifold. You can also see the heater hose connected to the throttle body:
Safety Car
Joined: Jan 2004
Posts: 3,556
Likes: 13
In the rubbish bin usually , they are the first items most commonly deleted by owners to clean up the engine bay.
The heater hose shown is run straight to the front of the intake manifold as part of the popular "TB bypass" procedure so there are no hose going to the port on the TB you show
The heater hose shown is run straight to the front of the intake manifold as part of the popular "TB bypass" procedure so there are no hose going to the port on the TB you show
Thread Starter
Advanced
Joined: Mar 2009
Posts: 86
Likes: 0
From: Portland Oregon Vancouver WA
In the rubbish bin usually , they are the first items most commonly deleted by owners to clean up the engine bay.
The heater hose shown is run straight to the front of the intake manifold as part of the popular "TB bypass" procedure so there are no hose going to the port on the TB you show
The heater hose shown is run straight to the front of the intake manifold as part of the popular "TB bypass" procedure so there are no hose going to the port on the TB you show
BTW, my L98 exhaust consists of Hooker 2149 ceramic headers which connect to a dual Borla exhaust straight piped out the back (read no cats) so emissions aren't even a factor.
Last edited by Big Daddy 360; Sep 4, 2013 at 11:55 PM. Reason: update info.
