Thread: 500E hesitates
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Old 04-16-2001, 08:18 PM
AusMB
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I have exactly the same problem with my 1988 300E
TRY DISCONECTING THE E.H.A.(ELECTRO-HYDRAULIC ACTUATOR) THIS IS UNDER THE AIR FILTER AND IS A BLACK LITTLE BOX ON THE SIDE OF THE FUEL DISTRIBUTER.UNPLUG IT WITH THE CAR OFF, AFTER YOU'VE WARMED IT UP. PART OF THE FUNCTION OF THE EHA IS COLD START ENRICHMENT AND IT MAY NOT START IF YOU DO THIS COLD. IF THE PROBLEM IS RESOLVED IT'S PROBALY NOT THE PLUGS NOR THE INJECTORS. (THE CAR WILL ALSO SEEM A LITTLE UNDERPOWERED DURING ALL ACCELERATIONS DUE TO THE LACK OF ACCELERATION ENRICHMENT.

THIS BRINGS YOU TO THE EHA, THE CONTROL COMPUTER, THE OVERVOLTAGE RELAY AND ANY NUMBER OF SENSOR THAT MAY BE AT FAULT. I'D SUGGEST A WIRING DIAGRAM AND START ELIMINATING PROBLEMS ONE AT A TIME; START WITH THE OVERVOLTAGE RELAY



[Edited by AusMB on 04-16-2001 at 07:30 PM]
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