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Old 11-23-2000, 11:39 AM
Steve190E 2.3 Steve190E 2.3 is offline
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Join Date: May 1999
Location: Calgary, Alberta, Canada
Posts: 190
I am going crazy here with my 88 300e(w124). My idle is too low at initial start up. Once warm it has a mind of its own. Sometimes it will idle high (only in park or neutral) and sometimes normal. I tryed adjusting the air/fuel mixture but at pin 3 on diagnostic connector I am getting almost 12v even with O2 unplugged. The idle switch is working fine. The car has been boosted a couple of times. Does this sound like classic overvoltage protection relay? Any help or ideas where else to look would be greatly appreciated. I don't want to go through the car and spend a pile of money to find the problem. I appreciate all the help I have had on this forum and think that this makes a benz more affordable.
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