Skip the auto shop - Our mechanics make house calls

Q: RPMs shooting up and brake hard to press

asked by on

The RPMs shoot up to between 3000 and 4000, but there's no acceleration. When this happens, the brakes get harder to press.

The symptoms you describe for your Oldsmobile Alero lead me to believe you may have a vacuum leak. It is very possible that one of your vacuum lines is starting to fail and this can duplicate a transmission slipping out of gear. It will also produce the experience of a hard brake pedal, as the brakes require engine vacuum to assist you in braking. To be 100% certain, it may be time to enlist the assistance of a certified mechanic to come by and inspect your Alero with you. With use of a scanner and a vacuum gauge, they can monitor the engine vacuum as well as the transmission during acceleration. They will be able to identify if this is indeed the problem or if these symptoms are a result of another problem. Once the cause of your symptoms is identified, they will be able to make the repairs necessary so your Oldsmobile can be driven without worry.

Was this answer helpful?

Need advice from certified mechanic? Get help now!

Over 1000 mechanics are ready to answer your question.
The statements expressed above are only for informational purposes and should be independently verified. Please see our terms of service for more details

Ask a Mechanic
(100% Free)

Have a car question? Get free advice from our top-rated mechanics.

Ask A Mechanic
Over 10,000 questions answered!

Get an instant quote for your car

Our certified mechanics come to you ・Backed by 12-month, 12,000-mile guarantee・Fair and transparent pricing

Get a quote

What others are asking

Q: rpm below 1 when idle

Hi there: What you're describing is not a normal situation. Although changing the spark plugs and O2 sensor tend to fix this type of issue, it could also be caused by dirty fuel filter, clogged fuel injector lines, or another...

Q: I can't accelerate or go fast while driving - 2002 Nissan Sentra

Hi there. The lack of acceleration you feel suggests several possibilities. There could be low fuel pressure caused by a faulty fuel pump or a faulty fuel pressure regulator. It could be a lack of incoming air to the engine...

Q: While pressing on brake pedal, car accelerated

Hi there, gladly you are okay after your accident. Brake failure can be a result of several different things. This can range from a failing brake booster, to air in the brake lines, to worn brake pads. Based upon the...

Related articles

What Causes Hoses to Leak?
While the largest part of your engine is mechanical, hydraulics plays a significant role. You’ll find fluids at work in a number of different areas. Your car's fluids include: Engine oil Transmission...
How Long Does a Distributor O Ring Last?
The distributor is part of the ignition system in your vehicle and its purpose is to route high voltage from the ignition coil to the spark plug. The spark plug then...
What are the Car Pool Rules in Hawaii?
Hawaii is widely regarded as a land of vacation and relaxation, and as such, its scenic roads and routes are far better known than the state’s freeways. But, as with all...