I have a 90 jeep yj 4.2lt running a stock carter carb. I have done a nutter bypass. It is an automatic. My jeep idles rough and when I am driving it seems to do fine, maybe a little rough. But when I come to a stop the idle drops so low that the engine dies. When parked if you give it gas the idle drops low but not quite enough to kill the engine. I have my timing set to 8 degrees btdc. Any ideas on what it could be? Plz help!!! I know I should ditch the Carter carb an go with a webber but that's not in my budget yet.