986 idles for a few seconds, then dies

[Jjay71]

Hey Guys
I'm new to the forum and to the boxster world.
I just purchased a 99 Boxster not running. I was told it was the ignition switch, and the switch was disassembled. I replaced the switch and the car starts but idles for a few seconds, then dies. If I try to give it gas it dies immediately. It seemed to be starving for fuel, so I replaced the fuel filter, pulled and cleaned the fuel injectors and reinstalled with new o rings and screens. I broke the fuel pressure regulator and replaced it. Fuel pressure at the fuel rail is about 57 psi.
I noticed oil in the intake, so I replaced the aos and cleaned the MAF sensor.
I replaced the spark plugs, so that takes care of fuel and spark. That leaves timing. Maybe the crankshaft position sensor? I hate to keep throwing parts at it, but so far everything has really been maintenance.
Any ideas would really be appreciated

[997_986]

Congratulation!
Any Codes? Otherwise a lot of speculaion.

[elgyqc]

I have had 2 CPSs die on me. The first was on a replacement engine and the car would not start without starter fluid, with which it would run briefly. A different CPS solved the problem. The second time the car would start when cold and run fine till it was turned off, it would then refuse to start till it had cooled down for an hour or two. Again a different CPS fixed it. I say "different" because both times I had a spare CPS that I could borrow from another engine. Buying a new CPS would be a good idea, if it doesn't solve the problem at least you would have a spare.
Good luck.

[Jjay71]

Sorry, forgot to mention no codes.
I did try starting it with the maf sensor connected, but not in the air flow. This allowed the car to idle and even tried to rev a little.
Easy part to try, so I have the second (and hopefully the correct) sensor on the way.