Engine Fires But Wont Stay Running...Please Help!!!

[jcfreeman0]

I’m finally ready for to fire up my motor and I cant get it to start. I’ve got a 2001 4.8 truck engine. It has an LS1 intake manifold, 28.8 ls1 injectors, ls1 fuel rail returnless style, MSD fuel pump, Professional Products Fuel Pressure Regulator, Removed EVAP system, Removed EGR, Shorty Headers, 220/222 110 LSA cam, SLP ti springs.

Anyways I’ve tried to get the motor to fire and it fires right up but immediately dies like the computer is shutting it down. Do you think this is a tuning issue at this point? I do believe I have everything hooked up but I could have missed something. Please help!!!

[foggy]

you need to have it tuned, have them disable vats.

[MidnightRider]

disable vats

[GasGuzzler]

No VATS on these but the Passlock is messing with you.

[jcfreeman0]

So a tune should hopefully get this thing running?

Its still a work in progress but it would be a huge motivational boost if i can get the engine fired up.

[ff_jeff]

yeah... tune. also make sure all sensors are plugged in. Like the MAF. I know on choppy cams like these a SD tune would be much easier than a reg tune.