Q: What causes poor fuel usage, loss of power, rough idle, check engine light, and now a weird whistling noise? We have replaced the

asked by on

Our car all of sudden started having acceleration issues, wouldn't go above 10 miles. The check engine light also came on. It also idles rough , has poor gas mileage, it also has been making a loud revving noise. We replaced the ignition coil pack, spark plugs, boots, crankshaft position sensor. After that the car would at least get up to normal speeds after revving up and shifting hard. We just replaced the ECM, the car went back to no acceleration. We also replaced the fuel filter. I don't know what to do at this point. The car is a 2005 saturn ion level 1.

My car has 189000 miles.
My car has an automatic transmission.

Hi there. It is very possible that the ECU is the source of all of these issues. If you recently replaced the ECU, but it was not reset or programmed by a Saturn dealership, it’s likely the reason for all of these problems. Although ECU’s are sold to consumers, they typically need to be "flashed" or programmed at a dealership to ensure they are properly communicating with all sensors and electrically operated or monitored systems on your vehicle. However, it is also possible that other fuel system components like mass air flow sensor or the fuel injectors themselves are damaged or simply need to be cleaned.

Was this answer helpful?
The statements expressed above are only for informational purposes and should be independently verified. Please see our terms of service for more details
  1. Home
  2. Questions
  3. What causes poor fuel usage, loss of power, rough idle, check engine light, and now a weird whistling noise? We have replaced the

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: Q: Engine not turning over

A year is a very long time to have a vehicle sitting. At least once a week the engine must be started and ran, and the vehicle driven until the systems are warmed up. The engine oil must be changed...

Q: Q: Humming noise

Hi, thanks for writing in. My personal experience with a humming noise while driving could be 2 things. You may need a front end alignment or wheel bearing. To check your wheel bearings you will need to jack up the...

Q: The check engine light and symbol comes on.

Generally, the check engine light comes on when something fairly serious is going on with the vehicle. This can happen for many different reasons such as a faulty mass air flow sensor, a faulty O2 sensor, a bad catalytic converter,...

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...