Skip the auto shop - Our mechanics make house calls

Q: I am burning WAY too much gas for the year and maintenance quality of the car

asked by on

Purchased the vehicle a couple of months ago from a older lady who had let it sit for 13 months. with fresh gas, new spark plugs, new air filter, suspension work, alignment and a new set of tires, I am experiencing an excessive amounts of gas being burn very quickly. No check engine light, no smoke out of the tailpipe, and tires all all properly inflated. I need to know the proper steps I should take to proceed in the diagnostic process. I do all the work myself and am knowledgeable enough to continue work myself. I do appreciate any and all feedback from whoever can help with this car. This is a make or break for me when it comes to keeping the car.

My car has 50000 miles.
My car has an automatic transmission.

A: Hi, thanks for writing in. This may be a si...

Hi, thanks for writing in. This may be a sign of a clogged catalytic converter. As you may already know, the catalytic converter converts toxic exhaust gases into less harmful pollutants that are suitable to be expelled into the atmosphere. When this is clogged, this causes these gases to be backed up into the exhaust system not allowing the engine to breathe properly (think of a backed up sink). When this happens, the engine I forced to work much harder to expel these gases. This often results in the engine bogging down and causing very poor fuel economy. This should also cause a check engine light to come on as the O2 sensors should be reading the incorrect amounts of oxygen in the exhaust gases if this is your problem. I would recommend having an expert from YourMechanic come to your home or office to confirm a diagnosis on the issue and make or suggest the necessary repairs or replacements.

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 do I view the driving range?

The driving range feature is displayed on the multi-information display, and shows you an estimate of how many miles you can drive before refueling. To view the driving range, press the display button on the lower left side of the...

Q: How do you open the fuel door?

In order to fill your gas tank, you’ll need to open the fuel door. However, your fuel door is secured in order to prevent possible siphoning attempts. To open the fuel door, you’ll need to use the switch. Here’s how:...

Q: AC is not working

Often times A/C systems stop working due to loss of refrigerant. Low refrigerant pressure means you have a leak. The leak can be a component like the compressor or evaporator core. It can also be something much simpler to repair...

Related articles

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...
How to Renew Your Car Registration in Oklahoma(DELETED)
Having your car registered with the Oklahoma Tax Commission is an important part of driving legally in this state. You will need to do this within 30 days of moving to Oklahoma...
How to Avoid Back Pain in a Car
If you have back problems, sitting in a car for an extended period of time can be excruciating. Even without back problems, you could experience discomfort and soreness from...