Question about 1991 Peugeot 405
ACAV (variable acoustic characteristic induction). An inlet manifold with a variable inlet tract system.
I would try the dealer, even though this car is over 10 years old...accordianman
Posted on Dec 15, 2008
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Posted on Jan 02, 2017
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I would check the medium sized rubber hose that goes to the brake booster from the inlet manifold as it can swell internally and prevent vacuum getting to the power booster. Replace if necessary. I would also check all those pesky little rubber vacuum hoses that are used for pollution control. They tend to go hard and split where they connect to the metal piping if they are over 10 years old, allowing air / vacuum leaks into the inlet manifold. It could also mean that the rubber diaphragm inside the brake booster has developed a leak and causing loss of power assistance.
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