1998 Dodge Caravan fuel and ignition

Recently bought a 1998 dodge caravan, 3.8L v6, van was overall in exellent condition, it ran and drove great! After about 3 weeks of driving, it started missing badly and about a mile later it died. Left my wife and new born baby stranded. Well when I checked it out, the fuel filter was clogged so badly it would hold fuel on the tank side. So I replaced the fuel filter. It would start after this, but it was running terriable, like it had jumped time. Given the miles on the engine this is exactly what I assumed. So after getting the van back to the house I pulled the timing chain cover off, indeed the timing chain was bad (over 2.5 " play) so I replaced the timing chain. After I got everything back togather(im pretty darn shure I got the timing chain installed properly), it still ran horrible. So, I replaced the plugs to see if this would help(it still had the origional champion plugs in it). Replacing the plugs did not help, so I pulled the new plugs back out one by one, and #2 covered in soot, #3 soaked in gass, #4 covered in soot, i've not checked the back ones just yet. But to me this is a good indication that the fuel and the ignition timing is off( as all plugs that I pulled fired just dandy pretty blue) im wondering if either I got the cam timing off ( the cam and the crank timing arrows were pointing in the propre positoin, with the keyway on the crank pretty much inline with #1), or if the ECM by the battery could be confused, or it's timing module is way way way way off base. I'd kinda like an opinion before I go tearing that engine back apart. Again.