Sr wont stay running...?

[future240owner]

So this has been a week from hell for me a new problem everyday. So we can get it to start every time and then it runs perfect for like 5 seconds after that it seems like it runs out of fuel or something, it bucks and slowly dies. I have a walbro 255 in there I run a 300zx TT fuel filter....any ideas I basically have till 3 o'clock to get this car running cause I leave for school tomorrow and the dmv closes at 4.

[SpeedRacer1]

ECU throwing any codes?

When the MAFS/MAFS circuit is not working right or if there is a bad vacuum leak it will run like you described. Look over those sections.

[burntricer]

also check your CAS mine did the same thing, but it was the CAS that was 180 out

[IanS]

is the fuel pump staying on, a friend did an SR swap and hacked the wiring, the pump would prime every time, but would turn off after cranking, so it would only run for about 5 seconds.

[future240owner]

all better it turns out when i told my friend to hook up the catch can line to the intake he took that as put it next to it and leave it once i connected that we were good to go.