I have a 1994 GMC sonoma, running wrong?

[aron ft]

i have a 94 gmc sonoma 4.3l v6 vortec, with 170XXX on the motor, new trans. we have put a distributor cap, plug wires, fuel filter, and flow master super 44 on this truck. it is running way rich, when i idle it is a rough idle and if i rev it oil splatters will shoot out the tail pipe. what could be wrong? maybe a injector? please help me.

 

[Molson02536]

Clean the EGR valve and clean it and the passage way. The EGR can be cleaned with carburetor cleaner, make sure you get all the Carbon build up cleaned and inspect the EGR to make sure it's not seized and is functional. The second thing that may have gone bad is your fuel injector system, common for the fuel pressure regulator to go bad and leak gas in the intake manifold. Start with the simple and clean the EGR valve and do a fuel pressure test and bleed down test. Good luck and keep me posted friend.