LS1 not starting....less fuel pressure ?

[ACII]

Hy all

today it was time to get the engine firing up the first time after the swap.

Unfortunately the engine is not running...

The fuel pump is running ....also i do have a spark

But i am not sure how much fuel pressure the injectors need for proper working ??

At the moment i dont have installed a fuel regulator....so the fuel just goes through the rails and back to the tank....dont know how much fuel pressure i do have ......

The engine does crank strong but there is not even a little firing..

Hope u can help me once again

Thx
Achim

[79c25]

I don't think that it will get any pressure to the injectors without a regulator.

[ACII]

unfortunately i just will get the regulator during next week.....that sucks

Tomorrow i gonna check if the pcm is sending a signal to the injectors...

CU
Achim

Originally Posted by 79c25

I don't think that it will get any pressure to the injectors without a regulator.

[ls1nova71]

You will have no pressure (or at least nowhere near enough) without the regulator. You can try a bit of starting fluid to see if it will fire off, just don't get carried away with it.

[ACII]

Hy again

in fact the fuel injectors need a specified amount of pressure for working..

I was able to press the return line together so i could reach a bit of fuel pressure...and immediately the engine fired up :-)

So i am looking forward to install the fuel pressure regulator and hopefully everything is fine..

I keep u updated :-)

CU
Achim