No codes shown, no CEL. Engine starts right up, then dies. If you pump the gas it is really hard to start. The fuel pump runs with the key on and when the engine dies it runs until the pressure builds up. This just started 2 days ago. I checked all the electrical connections and all seemed okay. I have not checked the fuel pressure, but when I press the schrader valve it shoots out pretty good. I was told the oil pressure sending unit could be bad and the engine thinks there is no oil pressure. Any help?

it could be the oil pressure sending unit, with no codes this will be a fun one. try picking the brain of a local technician.