There is gas in my crankcase oil.Truck skips until warm and has very low power. on 2002 Chevrolet S10

There are no diagnostic codes.I have replaced plugs,wires,

Asked by for the 2002 Chevrolet S10
Could be leaking injectors, fuel pressure regulator possible issue as well.
Is it necessary to remove the intake to replace the injectors on 2002 s10 with 2.2 engine.
If you can access them, which I have done but it is easier if it is out of the way.