Quote:
Originally Posted by rcoe
one line kept going forward toward the headlight and the other ran to the backside of the intake manifold, maybe to the hpfp.
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My batting percentage has not been too high with this thread, but anyway...
I think one side of that T draws vacuum from the intake manifold. The part that runs up by the headlight goes to the electric vacuum pump, which is mounted next to the radiator. This ensures the brake booster always has vacuum. I would expect a check valve somewhere on that line to the intake to protect the brake booster from boosted induction pressure.