Skip the auto shop - Our mechanics make house calls

Q: hi my car wil rev until 4000 rpm only, what should i chek???

asked by on

my car won go any farther than 4000 rpm.

A: Hi there, thanks for writing in. This is a ...

Hi there, thanks for writing in. This is a difficult question to answer with the limited information provided and not being able to see the car in person. This issue could be caused by several possible problems and only a diagnosis of each area would be able to isolate the cause. This could be from low fuel pressure, a clogged fuel filter, a clogged air filter, a faulty throttle cable, carpet blocking the throttle pedal, ignition system failures, computer problems, timing belt jumped, transmission, exhaust, and the list goes on. The fuel pressure or filter or a blocked exhaust will most likely be the cause, but a complete diagnostic check will need to be performed before a diagnosis is complete. I recommend having a mechanic, like one from YourMechanic come and diagnose the issue that you’re experiencing.

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: I have a hunting/high idle.

Hello. An irregular idle can be caused by many things. If the idle speed appears to stabilize with the throttle position sensor then it may be possible that the throttle position sensor is the source of the issue. The MAP...

Q: honda civic lx wont start

Initially, the goal would be to get the car running but it sounds like there may be some unresolved engine faults based on your mention of the multiple diagnostic codes that were downloaded. A Code Scanner should be used to...

Q: How do you make a call with the HandsFreeLink system on?

You can easily make a call through the HandsFreeLink® (HFL) system in your car without actually having to use the phone itself. There are actually several ways to do it. Voice Command: If you have a voice tag associated with...

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...
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 P0052 code means This code is seen when the Engine Control Module (ECM) tries to control the...
P2103 OBD-II Trouble Code: Throttle Actuator Control Motor Circuit High
P2103 means there is a fault with the throttle actuator control motor circuit, likely due to a defective electrical component or part.