I have a 2003 Nissan Altima 2.5s the Engine light is on it’s been on since I bought it back in March. When I bought it the second day the alternator went out I went to the junkyard got another alternator a few months later the fuel pump went out went to the junkyard got another fuel pump then starter went out went to the junkyard got another starter and solenoid. The other day the car stopped working out of nowhere put it in park tried to start it up couple hours later and it wouldn’t start. For a week I’ve been trying to work on it myself someone told me the crankshaft position sensor. So I wanna head and I bought brand new crankshaft position sensor and a camshaft position sensor replaced both car still wouldn’t start so I bought new spark plugs car still doesn’t start I replaced the valve canister purge thing, then the evap service hose I had noticed the vacuum hose was off I put it back on. Still no start then I noticed the ignition condenser was hanging around the spark plugs I bearly lifted it up and it broke from the base. So I went to the junk yard and cut off another came back and spliced the wires together. It started this time and died automatically with in secs. I’d put it into the one position for a little while sometimes a couple minutes sometimes a few seconds and then I will try to crank it up sometimes it will come on and then die automatically again . Someone told me that it could be the fuel pump going out since the fuel pump was a used fuel pump out of a junkyard. I noticed when I took the ignition Condenser cap off it had this stuff in it looks dirty to me but idk. Is that normal? I have spent a week almost every day working on this car I need this to be figured out I don’t know what else to do or what else it could be