Fuel smell eventually returned, and investigation showed a copious leak from the EHA with the engine running. Replaced o-rings (looks like maybe Merkey did one but not the other, as one still had enough resilience to protrude out from its recess in the fuel dist when the EHA was removed, but the other was flat) with M-B parts; that sorted out the leak. I think the EHA itself is faulty, though. Takes two tries to start, runs very ruff for a few secs. Stalled upon quick decel yesterday, accel is a little bit sluggish when passing on the fwy. Sound like faulty EHA to you guys? Any sense in trying to get a tested used one (if such a thing is even avail) until I can scrape up the $ for a brand-new one?