Q: Bad gas mileage, engine misfire - 1992 Cadillac Allante

asked by on

My car has a mileage of 132,000 miles. I've been getting a really bad gas mileage. It's 11 mpg on average. The engine has been misfiring a lot as well. I had the car tuned up recently but there was no improvement in either whatsoever. What should I do?

There can be multiple causes, but it sounds like your fuel injection is injecting too much fuel into the engine for the amount of air it’s using. Faulty temperature, air flow, or oxygen sensors, a dirty throttle body or incorrect fuel pressure are some of the more likely candidates. A professional mechanic, like YourMechanic, can diagnose this for you and make needed repairs to all of these issues, including cleaning the throttle body and replacing the oxygen sensors.

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. Bad gas mileage, engine misfire - 1992 Cadillac Allante

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: hi the code p0700 came on on my 2008 escalade how can i fix this?

This trouble code refers to a transmission control malfunction. This can mean a number of different things. The transmissoin could be damaged internally or there may be some sort of electronic malfunction with the transmission. I would recommend having a...

Q: 1992 Ford Tempo cranks but won't start

From the information provided there could be a variety of reasons why your Ford Tempo will not start. The fuel pump may power up and even make noise, but if it cannot provide adequate fuel pressure, the engine will not...

Q: Flames coming from the tailpipe and rough idle

Hello there, many common faults will cause your 1984 Dodge D250 to have a rough engine idle and have flames coming from the exhaust. When flames are seen coming form the exhaust it is most often due to unburnt fuel...

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...
Rules of the Road For Iowa Drivers
Driving on the roads requires knowledge of the rules, many of which are based on common sense and courtesy. However, even though you know the rules in...
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...