Skip the auto shop - Our mechanics make house calls

Q: After overhaul my Ka24 d21 doesn't rev pass 4000 rpm

asked by on

Ka21 after overhaul don't rev pass 4000rpm. I got it once to rev out and i drive it and after parking for an hour it limited at 4000rpm like its not getting enough gas.
My car has a manual transmission.

Hi there. From the description you have provided, I’m not sure running a recently overhauled engine over 4,000 rpm is a good idea. There is a 500 mile break-in period recommended by most rebuilders. Change the engine oil and filter after the break-in period, then drive it hard. Assuming you are past the break-in, it could be a fuel delivery issue such as a fuel pump or fuel filter. It could also be due to a restricted exhaust system, such as a partially plugged catalytic converter. To have all of this checked, I recommend having your vehicle’s power problem diagnosed and repaired by a certified technician, like one from YourMechanic.

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: Can I drive my car with a bad MAP sensor?

The Manifold Absolute Pressure (MAP) sensor is primarily used to provide fuel percentages to the intake manifold. If it's damaged, it typically causes no problems except for excessive fuel consumption and loss of engine power. It should be OK to...

Q: My car slowly came back to a stop and now it won't start. Mechanic said it's the timing belt or motor.

Hey there. It is very possible that your timing belt may have broken. It is also possible that some internal damage may have occurred to the engine. I would recommend having another mechanic give you a second opinion on what...

Q: I think my motor is toast.

It's possible you have major engine damage but to rule this in or out, the best thing to do is schedule an engine diagnostic. One quick test you can do is a compression test. Obviously, if compression is super low...

Related articles

What Causes Hoses to Leak?
While the largest part of your engine is mechanical, hydraulics plays a significant role. You’ll find fluids at work in a number of different areas. Your car's fluids include: Engine oil Transmission...
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...
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...