S-10 Trouble

I own a 1999 Chev. S-10 with a 2.2l fuel injected motor with 120,000 miles. One morning I went to start my truck and it had a VERY noticable miss and was blowing white smoke from the tailpipe w/ some black soot coming out of the tailpipe. The timing chain has been reciently changed but it drove fine until now. I did some checking and found that the back 2 cylinders are not firing.(#3) I checked Spark, Compression, Fuel Rail pressure(41lbs), had the computer scanned (no faults and all updates were installed) I also checked the wires going to the injectors with a noid light set and foung the back 2 injectors were acting very piculularly, if I removed them, both 3 & 4, the noid light would light(not pulse) but if I plugged either one back onto the injector the other would go dead. So I changed the back 2 injectors (no difference) and now I was told the cyl. Head may have had a problem, so I took the head off and inspected it and everything is fine along with the pistons and rings. The only thing I noticed were the spark plugs. The were wet. Very wet. But When I inspected the head, the valves and the cylinder were not wet. I am in the process of re-installing the head but need a little info on where to go from here.
Thanks,
Jgraff