car moves when foot is on the brake an engine revs

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carmoveswhenfootisonthebrakeanenginerevs

Last updated
Elixir Cada
Nissan Mechanic

Hello and welcome to ExpertHelp.com! My name is Elixir Cada and I'm going to do everything in my power to answer your question to your full satisfaction!

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Posted
Elixir Cada
Nissan Mechanic

Hi Archie,

It is possible that your brake master cylinder is leaking brake fluid into your power brake booster. Your power brake booster is connected to engine vacuum so if a flammable liquid such as brake fluid were to enter the power brake booster, the engine would be able to inhale that fluid.

When the excess ’fuel’ is added to the engine, the powertrain control module (PCM) will increase the idle speed to compensate for this extra ’fuel’. I would recommend to check the brake master cylinder first and check for any vacuum leak. 

Let me know if you have further questions. 

Posted

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