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Vacumm line Question

SDGTP99

SDGTP99

New member
How acuratly must one follow the vacuum line diagram? Since installing fuel logs and a boost gauge my lines no longer run the way they should. I have the boost and fpr lines connected before the lim. Does that even matter?
 


Fpr and map must see boost.

The fpr raises and lowers fuel pressure so that the pressure across the injectors is always 58 psi (3.5 bar).

This means the injectors will always have the same flow rate and offsets.

This only applies if you have a fuel pump rewire.

Without you'll need that fun shape gm came up with.
 
And they both do. I was just curious. Thought maybe the map and fpr readings could be a bit off with the lines run a bit differently.
 


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