1992 GMC Jimmy no acceleration

I have a 1992 jimmy and it starts and idls just great but I have no acceleration at all. I ran extermly low on gas and then this problem started. I have no cdes displaying or stored. I have replaced the fuel filter(very dirty), the spark plugs, cataltyc converter,did a fuel pressure test and according to the manual I had perfect pressure. Can you help me as I am on a very limited income and can"t afford to get another vehicle. Thank you.
Bill