fuel injectors

[quote:aaed074dff="kronix22"]i have a 1993 nissan altima with a cold air intake,2 1/2 " cat-back exhaust,racing header and downpipe,jet v-force piggy back chip and unorthadox lightened pulleys , now with all that do you think that i need bigger injectors than the stock injectors that are in there now and should i up the octane in my fuel? thanks[/quote:aaed074dff]when its cold outside like 20 degrees it does not like to start and im thinkin its a fuel problem but a little unsure but maybe due to some of my mods please help thanks