The injector coupler sometimes gets loose at the intake manifold. Remove l.s. lower platic and check. If it's dry.
Remove the round cover, (held in place by one long phillips screw), check if oil is leaking from the connections at the pump. If leaking, tighten the clamps. I have this last problem because the plastic hoses strech with time. Mind you my ped has 7,500 miles on it.