I would like to help. But need more information.
What size injectors?
Stock motor? any mods?
Do you smell gas?
gas mileage?
timing?
what grade gas?
spark plugs? when changed last
Could be a couple of things off the top of my head w/o knowing your setup. injectors to big, fuel pressure to high (if you have stock regulator ignore for now) leak somewhere, too high of octane and/or timing to low, spark plugs not burning 100% efficient causing it to have unburnt gas.