Skip the auto shop - Our mechanics make house calls

Q: Tapping noise when under a load.

asked by on

My car gets tapping noise when accelerating from stop. Once it pick up speed it doesn't do that. And the noise also comes back when going up hill. I have checked oil level. It is good. Please let me know what could be the problem. I can upload a clip of sound as well. Thanks.

As per request to an earlier question here is the sound clips of noise. Can be heard at 7sec onwards. https://soundcloud.com/user-420341856/voice-001

Sorry for the post. I did not know how to reply to earlier answer by David https://www.yourmechanic.com/question/tapping-noise-when-accelerating-by-jay-p

My car has 58500 miles.
My car has an automatic transmission.

Hi there. The sound that you provided for the tapping noise sounds as if your engine is dieseling when operating. This is a noise that occurs when the engine is either running too hot or has too much carbon on the pistons causing the fuel to burn when the piston is not at top dead center. There is a pinging noise and slight clicking noise as the engine is accelerated and then a loud banging type noise as the throttle is let off in the audio. The noise is the same as a Detroit Diesel engine shutting off. I recommend cleaning the engine parts with sea foam in the fuel system and the intake system to clean up any carbon on the pistons and valve train to reduce the temperature in the cylinders as the engine is running. If you need further assistance with your engine making a noise, then seek out a professional, such as one from Your Mechanic, to help you.

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

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: Will it damage my Honda Civic Hybrid 2005 engine to drive it with a bad lifter? 2005 Honda Civic Hybrid

Hi there - no, a tapping valve lifter won't cause direct damage per se, but will run less efficiently (on that cylinder) while clearance is excessive and tapping occurs. Since the lifters are adjustable, you would certainly want to have...

Q: AC not cooling

Hi there. This is a common issue that vehicles have. The AC in your vehicle compresses gas in order to cool the air coming through your vents. When it runs out of this gas it can no longer cool the...

Q: Antifreeze leak

It is not normal to see any coolant leaking after a radiator is installed. I would recommend having a coolant pressure test done to see if the hoses reinstalled after radiator was put in are sealing properly. You may also...

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...
P0052 OBD-II Trouble Code: HO2S Heater Control Circuit High (Bank 2 Sensor 1)
P0052 code definition HO2S Heater Control Circuit High (Bank 2 Sensor 1) What the...
P2103 OBD-II Trouble Code: Throttle Actuator Control Motor Circuit High
P2103 means there is a fault with the throttle actuator control motor circuit, likely due to a defective electrical component or part.