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I'm finally getting my turbo setup running but I'm wondering if my vacuum source for my block is wrong. My FPR is plumbed to it and my aem boost sender is there too. The fuel pressure is not dropping when it's running and the aem gauge isnt reading right either.
On a cable operated throttle, it is in a similar location to where the PCV engine filtered air inlet is located, and would not be a vacuum source. If that's the case, the fitting on the top rear of your intake manifold, the one with the zip-tied hose, is a good place to put a tee for a vacuum/boost source.
That fitting was a breather to the passenger valve cover. I'm running external cover breathers so I removed it. For future searches it is not a good source. Its before the throttle body so it wont read vacuum. The source on top of the manifold is where I ran my 3 bar map sensor to. I wanted it on a dedicated line. My solution was to move the vacuum block to the driver side and tee into the booster line.
Tapping the brake booster line for the block solved the issue. However my fuel pressure doesn't seem to be dropping as much as I had assumed. Vacuum line on the regulator is only dropping the pressure about two psi. Which puts it at 56psi.
05-26-2018, 06:55 PM
Vacuum source?
