Lack of enrichment under acceleration could be an indication of limp-home mode. Disconnect the electrical connector to the EHA to see if drivability changes. If it doesn't, you likely have a problem such a bad OVP relay or bad sensor.
Steve
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'91 MB 190E 2.3
'08 RAV4 Ltd 3.5
'83 Lazy Daze m'home 5.7
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