This is a great document to really help understand the fuel distributor and even though it's from a Porsche it is very similar to the ones used by most manufacturers.

 

Page 2

 

Page 3

 

Trying multiple pages.Pages 4 & 5

 

Pages 6,7,8

 

Pages 9,10 11

end of CIS Rebuild Doc

 

Warm Up Regulator

This is a great document on the way the WUR works and how to fix and clean it. It is not the vacuum version but the only difference is the vacuum version has the extra chamber below these upper chambers with the big bladder. I tested mine with a vacuum pump. Typically on cars that sat for a while the top chambers described in this procedure are real mess.

pages 1, 2 and the entire document in pdf format.

 

pages 3,4,5

 

pages 6,7,8

 

pages 9,10,11,12

end of WUR document

 

Excellent! Very helpful.

 

Sticky-worthy, for sure.

 

here's another article on the same subject although not as comprehensive.
Auto-Solve Diagnostic Assistance

 

Auto Solve Diagnostic Pages

The entire document is available from the link in the post from 1968;
Here is the page view broken into sections. It's just my effort to throw as much of this info into one thread, enjoy.

These are a system overview, an idea of system pressure and a break down of the fuel injector.

 

A continuation of the sectional break down. This is the "bundle" which is back by the fuel tank under the car that is often overlooked.

 

Of course the under hood favorites the Fuel Distributor and WUR which are covered in much better detail in the beginning of this thread. The air flow sensor theory of operation is also shown here.

 

Your cold start components are attached here. The aux air valve on the MB's I've seen do not look like this one but the theory of operation is similar, I like to say it is very similar to the operation of a choke even though some disagree. When the Aux air valve is not working properly or out of adjustment though you get the same symtoms as a choke out of adjustment; starts and dies, starts and stumbles for a while etc.

The cold start injector just shoots that little enrichment of fuel into the chamber for cols starting and remember it works with the TTS ( Thermal Time Switch ) which is supposed to only allow the enrichment during cold starts and only for a few seconds.

END of this series of documents.