PeachParts Mercedes-Benz Forum - View Single Post - 89 300SE Idle problem along with A/C woes

giewont · #9 07-19-2005, 11:35 PM

Just an update and maybe some more help if possible. I replaced the fuel filter as it looked like it was original. It still had the Blue plastic insulator same as the the fuel pump. No improvement in the "in gear Idle". Next located the OVP relay and pulled it out did the rattle test and it failed. Replace it with an OEM from the dealer and still no change. Started the "testing and regulating engine" procedure 07.3-110 and found the dwell at 14% and when I check the ignition coil on Jack 5 terminal 15 I read battery voltage but on Jack 4 terminal 1 I get 4.85 volts. According to the procedure it should be equal to terminal 15 reading on jack 5. There is another procedure (15-563 ignition system) that is referenced if it is way off. I tried braingears for that procedure but the server is up and down. Anyone have this procedure they can email me? Or does anyone have any suggestions as to way the readings are off? Did I miss something? I know my Hondas well but these gas powered MB are a little more then I bargained for.