Skip the auto shop - Our mechanics make house calls

Q: Car wont go above 4k rpm when my foot is down but goes above 4k when i release it a bit

asked by on

Hello sir, im out of options on the car. I have a 94 4runner 3vze engine with 249k miles. It doesnt accelerate on uphill roads and just stays at 30mph. But on flat roads it accelerates okay. It cant go up 4k rpm when my foot is down but when i release it a bit the rpm goes up. I changed the fuel pump, fuel filter, mass airflow sensor, distributor cap and rotor. I dont have any CEL on.

My car has 249000 miles.
My car has a manual transmission.

Hello. Most of the time when this occurs it is due to a few things. I usually start by checking the exhaust. Most of the time this is caused by a restriction in the exhaust caused by a failing catalytic converter. This sounds like the issue. If the converter is failing then it will need to be replaced. If the converter is fine then I check the timing belt. If the timing belt is loose or worn out then this can occur also. If you are trying to find this issue with your vehicle, consider YourMechanic, as a certified mechanic can come to you to [diagnose why it is losing power] https://www.yourmechanic.com/services/loss-of-power-inspection

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
  • Car wont go above 4k rpm when my foot is down but goes above 4k when i release it a bit

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 will not start

Hey there, thank you for asking about your 1994 Acura Integra. There are a few things that can cause a crank but no start condition, including no spark, no fuel, or a broken timing belt. The basics are spark and...

Q: Humming/whirring sound only when accelerating.

It is possible that you have a wheel bearing issue. It is usually worse when cornering in one direction and gets better when turning the other direction if it's just one bearing. The brake noise could be the return...

Q: Oil Light came on and car stopped

Unfortunately, if the Oil Light did come on, it is possible that the engine oil was low, and the engine was oil-starved. The oil should be drained in a clean pan, and examined to see if there are metal particles...

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...
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...
How to Avoid Back Pain in a Car
If you have back problems, sitting in a car for an extended period of time can be excruciating. Even without back problems, you could experience discomfort and soreness from...