1991 190E 2.6, this car has trouble with stalling when up to temp. I worked on the upper and lower chambers balance, the end result is 5.4 top and 5 lower, I have free play at the plate and it seems to be slightly rich. Adjusting the co gives me a reading of 0 and -1.23 but still will stall of course when you take it out of idle loop it runs but as soon as you let it contact the idle switch it will stall. I need some more thoughts about this problem. JNT thanks