Skip the auto shop - Our mechanics make house calls

Q: Poor fuel economy and sluggish acceleration. Also, my car has squeaky breaks.

asked by on

It seems like my car has been experiencing poor fuel economy recently. I drive maybe 60-70 miles and I see my fuel tank diminish by 1/4. The car definitely feels sluggish when accelerating, like I have to press further down on the pedal. I don't think the spark plugs have ever been replaced on this car and I've been told that this could be the cause. Is it possible that I need these replaced despite there being no check engine code for it? Is it easy for a mechanic to check?

Also, I replaced all my brake pads/rotors earlier this year, but still experience squeaky breaks each time after starting the car. It goes away after 1 min of driving, but this has been a persisting issue.

Thanks!

My car has 160000 miles.
My car has an automatic transmission.

A: Hi there. It sounds like you have a few iss...

Hi there. It sounds like you have a few issues here, but the loss of power and mileage is concerning. It sounds like you have an issue with a failing catalytic converter. If this fails it will clog the exhaust and cause an extra load on the engine which causes a loss of power and poor fuel economy. It can also be a sensor problem such as an oxygen sensor, but that is not as common. If you are planning on having this mileage and loss of power issue checked out, consider YourMechanic, as a certified mechanic can come to your home or office to diagnose and repair this.

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: How Much Does Using the AC Affect Fuel Economy

There are several variables that will influence the answer to that. It depends on your vehicle, how you drive, where you drive, and how hot it is outside. But there are some things that are certain: operating an A/C system...

Q: Loss of power and stalling when braking.

Having your car stall on you when you are trying to brake can be a frustrating and dangerous experience. Your RPMS dropping low and your vehicle stalling can be caused by a few different problems. The issue may be due...

Q: Brake pressure drops with bumpy roads

The brake accumulators on the Prius earlier models were prone to crack from vibrations and cause brakes pressure loss. I would contact your dealer to run your vehicle identification number to check to see if your brakes are covered under...

Related articles

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...
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...
How Much Does a Mechanic Make in Vermont?
Automotive technician jobs in Vermont have an average mechanic salary of $37k, with some mechanics earning a salary of $53k.