Warm Up Regulator
The following PDF contains notes on the Warm Up Regulator and how it works. Regards, John Pitman.
Playing with your K-Jetronic Warm Up Regulator, or WUR.
This little goody is a common culprit in K-jet or CIS problems, along with pumps, one-way valves, accumulators and fuel distributors.
Having recently sorted out a problem with mine and hopefully understanding its workings now, with help from Jay Kempf, I think a few pictures and text might help others to have the confidence to attack this guy... click on the PDF Icon for more.