Still Frustrated

Many moons ago I wrote about a PO300 Code Multi Engine misfire. went through everything everyone said. Even has 8.8mm/ heat resistant wires now. 9 sets of plugs AC delco of course.all new coils crank/cam sensors, new injectors,fuel pressure was just fine,battery, alternator,fuel filter, took the cat off. it was plugged due to problem. which will put back on once problem is fixed !!! . pretty much everything but the puter

I started her up the other day took off the air cleaner and there was what looked like a sludgy oil coming from the intake.but not oil.

3.8 for all those wondering. When it sits it fires in two cranks when it runs for a little bit it starts choking on itself. put it back in the garage it smells/ reeeks of fuel. cant start it right back up with out putting the pedal to the floor.(being fuel injected i know this is horrible and shouldnt do but have too) but if sits for more than half hour its fine. Like it has vapor lock or something