Q: Knocking/ Pining/ Dieseling noise

asked by on

Toyota dealer couldn't figure it out after trying tune up, fuel injector service. They sent a recording of the noise with a scan tool to a Toyota engineer and their response was thats normal. I have been using premium gas, tried carbon cleaner in my gas and nothing helps. I'm not an oversensative driver, the knocking gets REALLY bad when the car is going up a slight hill or getting on the highway via on ramp.

My car has 75000 miles.
My car has an automatic transmission.

Hi there. If your Tacoma is a 4x4, then check the transfer case and see if that is where the noise coming from. If it is, then the chain in the transfer case is slipping and needs replaced or repaired. If your Tacoma is a 2x4, then the noise would be coming from the flex plate as it could be bent or cracked. This is a common issue with Toyota vehicle. If you need further elp with your vehicle, then seek out a professional, such as one from YourMechanic, to help you with the knocking noise.

Was this answer helpful?

Need advice from certified mechanic? Get help now!

Over 1,000 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!
  1. Home
  2. Questions
  3. Knocking/ Pining/ Dieseling noise

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: Can I place gas back in my car after using 4 gallons of diesel?

Hey there. Unfortunately, diesel fuel does not combust the same as regular fuel does in a gasoline engine. Eventually, the car will run out of regular fuel and die as the diesel fuel is injected into the motor. Once this...

Q: Just had my radiator replaced and the temperature gauge went straight to hot and i have no heat

Hello. If you recently had major cooling system service, the first thing I'd do is ensure that proper parts have been installed and that installed correctly, such as the right temperature thermostat. Also that the correct coolant had been used...

Q: I replaced the tailight assembly but the the brake light still won't turn on.

You will need to do some further testing to figure out where the issue is. This is going to require you trace the power supply from the brake pedal to the bulb. All of the following can be the cause...

Related articles

How Long Does a Heater Control Valve Last?
Keeping the right amount of coolant in a car is essential in keeping the engine at the right temperature. Failing to have the right amount of coolant or even bad elements...
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...
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...