Fuel Pressure ???

[donZ]

how much sould it change, with line on??

40 with line on
50 line off

 

[strikeeagle]

It should decrease by the amount of vacuum you're pulling at idle. For example, let's say you're pulling 17" Hg (inches of mercury column) at vacuum. That equates to 17 X .49115 = 8.35 PSI.

And you slept through those science classes, because you thought they were useless...