One question here! How do you set the Idle Air Control Valve Properly? And how much should idle raise when you unplug the 3 prong switch that tells the computer that the accelerator is released? Mine raises from about 800 to 1100 when I unplug the 3 prong switch! And I at one point turned that screw on the IACV and I think I have it back where it should be roughly but would like to correct it to the proper position! Of course when doing this I have to re-adjust mixture to make everything ok since I change the amount of air going through!

Edit: When I pull the 3 pin plug it idles at 900-1000! When I pull the PLug that goes to TPS I get no change! When I pull the EHA I get a lower more rough idle and when I pull the IACV I get a slightly hiogher idle. Test on the TPS gives me infinite resistance at closed throttle all the way to just before WOT. Then I get 0 Ohms at WOT! This is for a 1986 190E 2.3 8 valve with the KE-Jetronic II not the 1987+ KE-III! Idle is slightly felt when in P or D and stopped! Runs fine everywhere else in the power band! Also new cap, rotor, plugs(copper Bosch), wires, OVP, freshly cleaned main ground, O2, Water Temp Sensor, Engine Temp Sensor, Vacuum thing in sensor group, new water pump, cleaned injectors and ICV, and cleaned IACV, all new rubber hoses from IACV to rest of intake and Zero Position right on target as well as mixture!

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~Jamie
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2003 Pewter C230K SC C1, C4, C5, C7, heated seats, CD Changer, and 6 Speed. ContiExtremes on the C7's.

1986 190E 2.3 Black, Auto, Mods to come soon.....