New Motor, Car Starts but shuts off
 

Hello All,

I am really scratching my head on this one. I just rebuilt my LT-1 from top to bottom. (See specs below) I dont have the full exhaust on yet and only have headers on. I went to start it for the first time and it started right up but quickly shut down (Loud as hell but sweet) I have already spent over $10,000 on this motor and it doesnt run. Please help me. Where do I start.


1995 LT-1 Vette
LT-4 Heads & Intake
392 CI Stroker (Block Bored and Honed, Deck Plate, Even Deck Height)
1.6 Roller Rockers
ZZ Performance Roller Cam 226-228 @50 110 Lobe Seperation
Mahle Steel Crank Stroke 3.78
Coyles true roller timing chain and gears
58 mm TPIS Throttle Body (Coolant By-passed)
Hooker Headers
MSD Ignition (Coil, Distributor, 6A & Wires all MSD)
Centerforce Clutch
ACCEL 40 lb Injectors
LT-4 Knock Sensor Module
SRP Forged Floating Pistons with Airless Gapless Rings
Borla Exhaust (No Cats)
Removed EGR

RE: New Motor, Car Starts but shuts off
 

Have you checked to see if you are losing spark or fuel? or injector pulse?

RE: New Motor, Car Starts but shuts off
 

Did the security light stay on when it sarted? you might have a passkey problem unrelated to the new motor.

RE: New Motor, Car Starts but shuts off
 

A fail-safe???

Either the oil pressure is not 'registering' by the ECM, as the motor starts, and the spark kills, or the fuel pump kills.

OR, the ECM isn't telling the fuel pump to re-start (after the initial 2-second priming and shut-off).

I think mech259 could tell you where to check these...