vaccum from engine goes to zero when put in drive

Asked by Sep 30, 2016 at 06:14 PM about the 2007 Ford Fusion SE V6

Question type: Maintenance & Repair

2007 ford fuzion 3.0 vaccum in engine is at 16 when in park but when you pu
it in drive or reverse it goes to zero so theres no vaccum to the power brake
booster and it makes the brakes really hard

3 Answers

9,540

Bad Brake booster check valve can cause hard pedal.

The engine vaccum goes to zero on the intake manifold when put in drive

The brake booster hose is disconnected and im taking vaccum pressure fro intake manifold

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