on saturday night, and a few previous times also at night, my car will just stop running at idle. I have messed with the carb and I still cannot tell if that is the problem, whether it is too lean or too rich, the reason I cannot get the idle ajusted right is because It is bigs carb with a 4 corner idle, but I need a correct way to adjust the idle. Should all the idle screws be set the same? meaning the same turns out from the bottom? I try to adjust the front two first, then the rear, but any little adjustment changes the way the car runs, it seems a lot harder to do then 2 screws.

I can get it running good at operating temp during the day when temps are in the 70's but at night it will drop down to 50's and it seems to run different.

Could someone please explain an idiot proof way of adjusting a 4 corner idle?

also I am thinking that this might be an ignition problem. as i said this happens at night, so my lights are on, the radio is on, and since the engine is hot my electric fan is on. Is it possible these may be robbing power from my ignition causing a weak spark? How can I check this?

Also how big of an effect should the air change from when the fan is on and when it is not have on the carb. At night it is cold, low 50's but when the fan kicks on the air temp is much higher. should that difference in air temp have a drastic effect on the idle?

Could the cam I have with the low compression ratio also make idle quality pretty hard to get right since I have a lower compression in the cylinders at low rpm cause the larger cam bleads off the pressure? this might be why it's hard for me to get the car to idle at a real low rpm even with the 4 corner idle?

sorry for the long post, this is just real frusterating. Happy Holidays!
[addsig]