Below are some pictures of an air intake plenum assembly and some
supporting components from a 2000 ford crown victoria
The idle air control valve (IAC)
The exhaust gas recirculation (EGR) valve
The throttle body and the throttle position sensor (TPS)
The location on the plenum where the IAC valve mounts.
The location where the EGR would mount
The location where the throttle body would mount
This is where the plenum would normally connect to the intake manifold
Here's the throttle body.
And the bolts which hold the throttle body to the intake plenum
A closeup of the throttle position sensor. From the factory, the TPS
screws have thread locker on them.
Take note of the EGR, TPS, and throttle body gaskets
Here's the EGR valve with the metal tube that runs to the exhaust
manifold connected. Note the flexible DPFE sensor hoses.
When new, the metal tube twists off the egr valve with minimal effort.
But on that 100k+ mile car, you'll likely have to use an acetylene
torch to heat the connection first before using a wrench.
Here's the connection of the egr tube to the exhaust manifold. This
connection often requires lots of effort to seperate on the 100k+ mile
This is the area of the exhaust manifold that the catalytic converter
flange would normally connect to.
Normally, there would be a stud screwed in to hold the catalytic
converter to the exhaust manifold.
Here's the side of the exhaust manifold which would normally be
connected flush against the cylinder head exhaust ports.
And a closeup of the casting numbers
Here's the pcv valve and the line which connects it to the air intake