Let's assume it's fuel related. First you need to test for fuel pressure and if it's not to spec possible causes are: bad fuel pump, clogged filter or a failed regulator. Do the easiest first. Filter, replace if you don't know how long it's been in use. FPR, remove the vacuum line. If there is any hint of gasoline it needs to be replaced. To confirm the fuel pump the first two possible causes need to be verified as being good. Fuel pump needs to be tested KOEO and KOER. KOEO should be about 40 psi. KOER about 35 psi.