Skip the auto shop - Our mechanics make house calls

Q: Car not revving over 3,000 RPMs

asked by on

The car will not rev over 3,000 RPMs.

Fault codes need to be read out of the engine computer to guide the direction of diagnosis. If no fault codes are stored, then possible issues could be a camshaft sensor, or crankshaft sensor that losses its signal at that engine speed. Also, the engine management system on the Neon Turbo uses a speed density system, which uses intake manifold pressure to set up injection timing. If the MAP sensor is not reading pressure correctly, then injection timing may not be set correctly by the engine computer.

One last thing to check is fuel pressure and volume. If the fuel pressure is dropping as engine load increases, then the engine will stumble due to a lack of fuel.

There is a technical service bulletin on the Neon for updated spark plug wires, but this issue doesn’t just limit the engine RPM’s to 3000. Nevertheless, you may want to make sure that you have the updated wires. You may want to enlist the help of a mechanic, such as one from YourMechanic, who will have the equipment and expertise to diagnose these types of drivability issues.

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: My Rpms start to go up like crazy and seems to lose power when I'm at WOT

In many cases, the symptoms you're describing are related to a blockage in the fuel delivery system; perhaps the fuel injectors or the throttle body itself. Over time, carbon builds up inside the throttle body and the [fuel injectors]((https://www.yourmechanic.com/article/what-causes-fuel-injectors-to-get-clogged-or-dirty) which...

Q: crank no start problem

We need to start by considering the amount of repair work that has been done recently. It is always wise to double check those repairs made are still holding. A poor connection from one of the sensors your placed could...

Q: Car not starting when it is warm

The cam sensor may be causing the problem but it should be setting a code when it does not start. The engine needs to be scanned when the no start is happening to see if you are getting a cam...

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...
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...
P2428 OBD-II Trouble Code: Exhaust Gas Temperature Too High Bank 1
P2428 code definition A P2428 trouble code signifies that the PCM has detected a problem in the exhaust gas temperature sensor circuit in bank 1, which subsequently contains the number one...