won't start

Help I'm at my wits end 2001 jimmy dr 4wd 3.4 mpfi
, it cranks and wants to start but just won't. I've checked fuel pressure its good at 64 psi when key is turned on I've checked spark, with a gap type spark checker it's good blue at about 3/4 inch gap.No codes or faults with scan tool, brand new cap and rotor, new fuel pressure regulator, verified injector signal with NOID light all is good. ANY IDEAS? :mad: :confused:HELP PLEASE

Will it fire if you spray carb cleaner or some starter fluid into the intake? I know you show good spark but I have run into some bad coil wires on these, try substituting a known good coil wire if it won't start with carb spray.