M110 switchover valve connections & vacuum problems
 

1985 280SEL. Spark plugs, wires, and distributor cap were recently replaced.

Engine and trans were swapped from a 78 280SE euro. Whatever is missing from this photo was taken from the original engine:

http://i735.photobucket.com/albums/w...s/e9687433.jpg

The car dies when hot and idling with the A/C on and in gear. Switchover valve suspected, and it's not even hooked up.

http://i735.photobucket.com/albums/w...s/8d6b3c7d.jpg

http://i735.photobucket.com/albums/w...s/3e4a585b.jpg

Where do these vacuum hoses hook up to?


A few other vacuum maladies:

This is not hooked up to anything. :confused:
http://i735.photobucket.com/albums/w...s/744661d9.jpg

Nor is this:
http://i735.photobucket.com/albums/w...s/a74a534e.jpg

This is plugged:
http://i735.photobucket.com/albums/w...s/6ca02f56.jpg


A few more details: Cold starts are immediate, hot starts require giving it some gas. Seems to be running rich and eating fuel excessively. Has a misfire every few seconds MOST of the time but not ALL the time.

Any guidance on these issues would be greatly appreciated.

Fuel mixture & warm-up are related to fuel pressures.

Is the electrical connector on the warm-up regulator connected?

The vacuum brake booster line should have a vacuum port for the connections to the central locking system.

Thanks for the reply, Doc.

I'm 90% sure the WUR is connected but I'll double check it. The RPMs go very high on cold starts and come down to normal when warm, so I'm guessing it's working.

I thought W126s had a separate vacuum system for central locking, with it's own electric pump? Central locking works perfectly on the car.