Skip the auto shop - Our mechanics make house calls

Q: I've got a knock it increases when I push on the gas should I just replace the engine?

asked by on

So I go to accelerate from a stop light and my 4runner barely accelerates and starts knocking I didn't have cab fare so I drove it the rest of the way home about 5 miles. It only stops knocking about midway through the RPMS before the shift. Is it time to take her to the mechanic and get it running like new or is it time for a new car? Toyota Holds it's value fairly well I just don't want to fix something that would be worth less than my mechanics bill.

My car has 177000 miles.
My car has an automatic transmission.

Hello, and thank you for writing in. A knocking noise may be coming from the engine or the exhaust. Without pinpointing the exact location of the repair, it is very difficult to compare your options truthfully. An exhaust leak will cause the engine to lose power and make a knocking noise. The timing belt, and accessory belts can also create a knocking and are fairly simple to replace. More serious issues may also be happening, but we will not know until we find out where in the vehicle the noise originates. With that being said, even serious repairs can be rebuilt or replaced. It all depends on the rest of the vehicle’s condition and its sentimental value to the owner. For more help inspecting the vehicle, contact our service department to schedule an appointment.

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
  • Home
  • Questions
  • I've got a knock it increases when I push on the gas should I just replace the engine?

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: Broken coolant hose

A broken coolant hose is always bad news as the vehicle cooling system cannot operate when the coolant level is low. If the broken portion of the hose was attached to a major component, it is likely the entire hose...

Q: Slight knocking while driving

If your car has been leaking oil for an extended period and you hear knocking, it's possible that an engine bearing has either spun, or is about to spin in its bore. After fixing the oil leak, I would recommend...

Q: Mustang squeaking and squealing

Hi there. If the noise is occurring when operating the clutch, then it may be in the clutch itself. If there is slipping, then the clutch itself is bad. If the noise only occurs when pressing in the clutch, then...

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...
Rules of the Road For Iowa Drivers
Driving on the roads requires knowledge of the rules, many of which are based on common sense and courtesy. However, even though you know the rules in...