Hard to start cold, please help
 

Hi all, My 1989 2.3 doesn't like to start cold. It did this before and then just stopped and now it has started again. I had to use starting fluid this morning, and then after work it took about 15 minuets to get it to start. The fuel filter, fuel pump, is brand new, and pretty much every sensor had been replaced. I'm stumped on this one, any and all help would be greatly appreciated, thanks guys. :help: