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Vacum problems

David Coupar

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My son has a 2015 fiesta 1 ltr eccoboost.

It has developed a fault with the vacum and brake pedal.

Engine is rough and foot pedal is solid any suggestions

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On a 1.0 ECOboost it is more likely that the camshaft driven vacuum pump has failed.

The vacuum pump on these engines is well known to fail in 2 different ways:

1: The integrated plastic check valve is broken. The check valve is part of the pump and not available as a separate part from Ford. There are however aftermarket part available to fix this problem.

2: The vacuum pump developed mechanical damage and clogged the check valve with debris. This is an early sign of oil starvation caused by wetbelt particles blocking the oil pump inlet. 

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