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!!!

 

Did you change out computer? If so it sounds like you need to do a security relearn,takes about 30 minutes and 3 key cycles to perform.

 

how do i do that??? I did notice the "security light" on the dash was on. Didnt know what that was or if that means anything...

 

Turn key to on position but do not try to start.Leave key on for 10 minutes till light goes out.Turn key off for 30 seconds,Turn key on again until light goes out.REPEAT A THIRD TIME.AFTER LIGHT GOES OUT THIRD TIME IT WILL START RIGHT UP.

 

well i tried but didnt have any luck. The lights just cycle on the dash from battery to security and never turn off. I've got to send it out to get retuned anyways, but can they turn off the passlock?

 

^^^ check your map sensor it could be it... that happend to me and it wqas the map sensor wasnt plug-in.

 

just checked that and even tried another one in it. Still no luck. I'll try to relearn it tomorrow again. if you have any more ideas let me know. i'm open to try anything to get this to fire up

 

I was told you have to attempt to start it each time on the relearn procedure.

 

Get your tuner to disable the VATS

 

I still cannot get it to start after trying that method several times. I've done it several different ways as people have said and still nothing. I'm hoping one of these tuners email me back soon so i can send it off to them. Thanks for the help anyways.