Well, I finally got back to my 300CE.

I removed the throttle body to change the base gasket because spraying starting fluid around the area made a slight difference.

I found a small crack in the boot around a clamp indentation. It almost seems like somebody's been in it before because everything came apart too easily, but I've had for 22 years and nobody has touched it.

What I did find was the EGR tube flange bolts were loose and one was missing. It wasn't tight to the manifold so I doubt the EGR sytem is working.

There also was a vacuum hose that had fallen off on the throttle body. I don't know how it ran as good as it did?

Also there is oil puddled in the intake manifold and a slight oil film on the throttle plate and resonance valve. Would that be the PCV system not working? I can't find any mention of a PCV valve.

I also found that my throttle body harness insulation has crumbled. The engine harness has been replaced.

I removed the cover and somebody's initials are on the plastic gear. I'm trying to work up the nerve to rewire it.

I bought another used unit on ebay that was supposed to be tested (how?),
but that harness is bad too. This is the second one. Somebody has been in this one and sprayed some green coating on the wiring/circuit board. I was going to try rewiring this one so I didn't screw up my original, but I don't know if these internals are any good. The date on this is 5/95.
I wonder if I should rewire this one?

The original is 8/92.

What do you think?

Thanks