Originally Posted by krinderhagen

I am working on 1985 Mercedes 190E 2.3 gasoline engine i replaced the engine after finding the cam lobs worn, however this replacement engine is running rough. the timing i am not able to check as it says somewhere that the 5 degrees before top. i used the dash board economy gauge to adjust the air fuel mixture, as i turned in clock wise till it almost quit running then backed it off till the needle read the highest vacuum. the rpm at this point increased to 900 from 700. if it is supposed to idle at 500, i am in trouble. t has new plugs and all cylinders are firing. I believe my ICV is working and i checked for vacuum leaks. the temperature is just above the 48 on the dash indicator. the engine smooths out as the rpm increases and when i put it in gear reverse or drive the RPM drops.