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Old 11-28-2014, 05:28 PM   #1
ACII
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LS1 not starting....less fuel pressure ?

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
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Old 11-28-2014, 06:03 PM   #2
79c25
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Re: LS1 not starting....less fuel pressure ?

I don't think that it will get any pressure to the injectors without a regulator.
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Old 11-28-2014, 06:13 PM   #3
ACII
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Re: LS1 not starting....less fuel pressure ?

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






Quote:
Originally Posted by 79c25 View Post
I don't think that it will get any pressure to the injectors without a regulator.
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Old 11-28-2014, 07:08 PM   #4
ls1nova71
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Re: LS1 not starting....less fuel pressure ?

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.
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Old 11-30-2014, 08:28 AM   #5
ACII
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Re: LS1 not starting....less fuel pressure ?

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
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