Skip the auto shop - Our mechanics make house calls

Q: Tapping noise at high rpm only.

asked by on

When the van is idling there is no tapping only if I really rev it. Then there is a loud tapping noise that gets faster with higher rpms. While driving it only makes the noise when accelerating fast to get into flow of traffic or when it down shifts going up a hill. Again, just during high rpms. I can cruise at 75 and no noise.

My car has 99600 miles.
My car has an automatic transmission.

Hello, thanks for writing in about your Ford E-150. The noise may be the engine is pinging from pre-ignition. This can be due to ignition timing that is too far advanced. Another possibility is that the EGR valve is not working or if the passages are clogged. Have system diagnosed by a certified technician, like one from YourMechanic, they’ll be able to perform these checks and diagnose the noise you’re hearing firsthand.

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: Car Hesitation Acceration

First, there are many possibilities with such a symptom, but I can make a few assumptions based on you detailed description. Primarily, it sounds as if your car has a rich running condition when it is acting up. Cold motors...

Q: Torque converter vibrates - 2005 Chevrolet Avalanche 2500

Torque convertor "shuddering" is a cycle where the torque convertor tries to lock up, can't, and re-cycles repeatedly. General Motors has a service bulletin - TSB Reference #3438A, that addresses this issue. Discuss this issue with your dealer.

Q: My car won't start - 1994 Toyota Camry

First, check fuses for ignition and the engine management computer (ECU). Do you hear even the slightest "click" from the starter area? If so, the starter solenoid has failed. Given the age of your Toyota, the ignition switch or...

Related articles

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...
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...
P0240 OBD-II Trouble Code: Turbocharger Boost Sensor B Circuit Range/Performance
P0240 code definition Turbocharger Boost Sensor B Circuit Range/Performance What the P0240 code means P0240 is an OBD-II generic code triggered when the Engine Control Module (ECM) detects the intake boost...