1989 Acura Legend 1989 Acura Legend starts then dies

I am working on a 1989 legend. 1 week ago car would start then die I checked dist. Cap and rotor was dirty cleaned car started and ran next day replaced dist. Cap and rotor car ran fine about 3 days then would start and run a second and die. Once while driving the car during this time lost power and headlights dimmed for a little bit but was able to drive it home.I have replaced battery and had alternator checked. The main relay was replaced by previous owner 6 mos. Ago. I removed and replaced fuel filter and I am getting fuel from the fuel pump ( did not pressure check fuel system as I cant keep car running). I am getting spark at all plugs while eng. Runs for a second. Had a friend come over to look at it it started right up and ran fine. The next morning I satrted it it ran fine after a couple mins shut car off and now it starts and runs for 1or2 seconds and dies. Pulled vacume line off fuel pressure regulator and saw no fuel. Checked for stored codes under carpet of front passenger side florboard and there is no stored codes check eng. Light has not come on. Please help with a list in order of what to check and how to check it. ( I am not to good at checking with voltmeter/ohms tester but I know I could do it if I know excatly what to check and how to check it ) I also changed spark plugs.