1994 Trooper rough start?

My 1994 Trooper S 3.2L SOHC has a hard time starting if alowed to sit for more than an hour in ANY weather, ill crank it, and crank it! i have already replaced the fuel filter and fuel pressure regulator. im not to sure what it might be.

I have heard of ECUS (ECM/Computer) going bad and causing this but usually only on jeeps....any ideas guys?