what could cause the engine to choke?

[EstoMax]

Ok guys so im getting the car to run now for 10-20 seconds clean and fuel pressure stays at 40psi. But the next problem in the series is that It seems to be choking out after about 20 seconds(max) of running. At about the 5-10 second mark i have to start adding gas to keep the revs up (keeping revs around 2-3k) and when i pull off the accelerator it just dies hard. My electric oil pressure gauge which is right after the oil filter is reading about 75 psi (relocated oil filter).. which seems a little high for 3k rpm's but its a brand new motor so that may be ok. Anyways after it dies off like that and i try to crank it right away the starter spins really slow like something is blocking it. If I let it sit I can crank it again and do the same thing over again.

I cant think of what could cause something like that? I did these cycles until the car pretty much warmed up all the way so it doesnt seem to be heat related...

any input would be great TIA Marko

[EstoMax]

i took some footage.. dont know how much it willl help thoughhttp://media.putfile.com/marko-240sx-effed

the car is turboed btw.

[navysnail]

so has it been doing it since you put the turbo on (or maby you swaped engines, I don't know)? Or did it just start?

[EstoMax]

well it seems to have fixed itself. What i did was put fresh fuel in there but i dono how it would run ok for 10 sec with bad fuel. (gas was premium and about 8 months old)

Marko