It looks like you're trying to measure the current draw of the EHA valve in operation, correct? And I assume that you've rigged your meter so that it lies in series with the voltage being supplied to the EHA as well?

If the answer to both those questions is yes, then you have set up the rig correctly. However, I don't think that's the problem here. I think that the EHA voltage is a pulsed current (somebody correct me here if I'm wrong) and a digital meter will have a hard time getting a reading on a rapidly pulsing signal, for current measurement especially.

Either that, or you've got an open circuit, or the impedance of the meter is too high for the circuit to be happy...

So, just to sum up where we are here -- The car is sluggish and runs rich. You've eliminated a ton of things, have you eliminated the fuel distributor, particularly a sticking piston? Also, have you eliminated plugged up cats?

__________________
-tp


1990 300SE "Corinne"- 145k daily driver - street modified differential - PARTING OUT OR SELLING SOON - PORTLAND OR. AREA - PM ME FOR DETAILS
1988 560SEL "Gunther"- 190K passes anything except a gas station
1997 S420 - 265k just bought it with a rebuilt trans. Lovely condition