Skip the auto shop - Our mechanics make house calls

Q: The car wont go over 4000 rpms

asked by on

My car dooesnt go over 4000 rpms wnen warm and theres a popping sound from the engine

My car has 200000 miles.
My car has an automatic transmission.

A: Hi there. This sounds like the engine timin...

Hi there. This sounds like the engine timing is off. Check the camshaft sensor and crankshaft sensor to see they are working. The computer has the engine in limp mode to keep the rpm’s from going up. If the timing on the engine is good, then check the spark plugs to see if they are burned or broken. If the spark plugs are in good shape, then check the engine compression to see if there is any burned valves. Popping sounds can be either done by an engine out of timing or a valve that is burned or bent. If you need further assistance your vehicle, then seek out a professional, such as one from YourMechanic, to help you with diagnosing the engine popping sound.

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: I have a,2004 Cadillac CTS,. there is a whining noise coming from the rear tire passenger side- what could it be ?

Hello, thank you for writing in. When it comes to potential brake issues, you want to have it looked at as soon as possible. The brake system is THE most important safety feature on the vehicle. If you have leaking...

Q: Heard a loud bang when I turned on my car yesterday. 2007 Volvo XC90

Hi there - this is highly unusual behavior, and should be checked out immediately. Check for problem codes, even if the Check Engine light is not yet on. This is a misfire condition due to an over-rich condition, possibly due...

Q: Where can I find an A/C compressor clutch (compressor is fine).

Hey there. You may be able to find a complete clutch at an aftermarket parts store. The compressor with a new clutch may be a better choice since they are most likely available and cheaper then purchasing the clutch parts....

Related articles

How Do Power Car Windows Increase Passenger Safety?
Power windows are responsible for approximately 2,000 emergency room visits every year. When a power window closes, it exerts enough force to bruise or break bones, crush fingers, or restrict an airway. Though...
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...