LS3 crate motor will not start

[52Chev]

I have a LS 376/525 crate motor installed and it will not start. Help please.

 

[acarmody]

To what extent? Won't crank, or fire up?

 

[52Chev]

It will crank, power to coils and injectors. MAF, MAP and Rpm all work but will not fire.

 

[383 hatch]

Has it got fuel? Some more info would certainly make life a bit easier.

 

[52Chev]

Sorry mate. 60 psi at rails.

 

[383 hatch]

So, it has power to the injectors, but are they actually getting a pulse? The Ecu controls the earth side of the injectors, so it's possible for the injectors to have power and not pulse if the ecu isn't sending the signal for whatever reason. I assume it's in a 52 chev, if it is has the theft deterrent been removed/bypassed?

 

[52Chev]

All of the VATS, BCM have been removed. Being a crate motor from GMPP it should have been plug and play? It seems it has everything but the final part of the puzzle to go bang.

 

[Drewie]

I assume the ECU you are using matches the reluctor wheel on the engine, there were 24 tooth wheels and 58 tooth wheels.

 

[383 hatch]

You need to get hold of a noid light to see if the injectors are actually receiving a pulse, my bet is they aren't pulsing. The other way is to spray some aerostart into the throttle body, if it runs it's an injector problem.

 

[52Chev]

Checked earth with multimeter while cranking and no change of state. Had plugs out and no spark either.