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.

A: Fault codes need to be read out of the engi...

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・Save up to 30%

Get a quote

What others are asking

Q: My vehicle stumbles and hesitates, and the RPM go crazy

This may be a sign of a dirty or failing mass air flow sensor. The mass air flow sensor is a unit in the intake system that monitors air intake as it is mixed with fuel prior to being injected...

Q: Lights on dash suddenly started flashing while driving, accompanied by car surging & stalling

The vehicle may have a problem with the power relay in the central junction box that powers the ignition and computer on the car. The relays and connections to the junction box will need to be checked if the problem...

Q: I can't figure out why there's a leak coming out of the coolant reservoir tank

Hi there. Check the radiator cap to see if it is sealing. Put a pressure tester on the radiator cap and pump it up till the pressure spits out, then let it sit. If the pressure drops down, then the...

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 Heater Control Valve Last?
Keeping the right amount of coolant in a car is essential in keeping the engine at the right temperature. Failing to have the right amount of coolant or even bad elements...
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...