Mixture screw adjustment...scary stuff

[grober]

There should definitely be a manifold vacuum sensing line from the inlet manifold to the fuel pressure regulator somewhere, but since its operation is independent of engine operating temperature it will not be routed thro any thermal switched valve. It will have a direct line- try this also KE Jetronic Diagnosis - MBWorld.org Forums

 

[carat 3.6]

ahhhh hang on a sec. I've just realized that the loose transparent vacuum pipe which i discovered a couple of days ago was supposed to connect to this 'thermostatic valve' as it ends up on the throttle body, right?
I actually connected this to the fuel pressure regulator. So, i i put it onto the thermostatic valve THEN i should get some hose from a hardware shop and connect the fuel pressure regulator and the tiny tube which comes off the rocker cover. Would that help?
thanks for your patience

Now you've got it.

I think the hose from the pressure regulator should go to the rocker cover breather hose, where this yellow pipe is:

 

[Stringer]

ding dong....by jove i think he's got it
thank you carat, grober and dieselman. I'm sorry i dragged you away from pints, skirt and more interesting things.
cheers a lot
martin in beirut

 

[Stringer]

still runs a bit rough, but better now. It starts to miss and shudder a little at almost 2000 rpm.
I'm begining to think this must be either an ignition fault (ht lead or distributor cap) or one blocked injector.
Can i pull off the ht leads one by one to find the faulty pot without being zapped with 10,000 volts? Is it with a rubber glove, chaps?