Dave:

If the EHA is leaking, it's toast. Get a new one -- may cure the idle valve problem too. It's leaking out the weep hole from an internal leak.

EHA current should be 20mA on starting, drop to near zero and flucuating when the O2 sensor warms up, the stay near zero except when the throttle is opened or closed -- should then go up temporarily when throttle is opened ("accelerator pump"), and drop to -10 or -20 on closed throttle coast for CO reduction under high vac closed throttle (fuel cutoff).

Peter

__________________
1972 220D ?? miles
1988 300E 200,012
1987 300D Turbo killed 9/25/07, 275,000 miles
1985 Volvo 740 GLE Turobodiesel 218,000
1972 280 SE 4.5 165, 000 - It runs!