Skip the auto shop - Our mechanics make house calls

Q: Cylinder misfire

asked by on

Every cylinder in my car started to misfire so I changed the fuel filter, cap and rotor, throttle body, IACV, all my sensors work and I've cleaned the fuel injectors . But I still cannot find the problem. There's also a gas smell every time I leave the car. Anything that can help would be great.

My car has 224000 miles.
My car has a manual transmission.

A: Hi, thanks for writing in. The strong smell...

Hi, thanks for writing in. The strong smell of fuel is usually attributed to a failing mass airflow sensor or O2 sensor. These two sensors control air/fuel adjustments and can cause a misfire if they have triggered a lean fuel condition. If you would like help, consider having an expert automotive technician from YourMechanic come to your home or office to inspect and diagnose this issue for you, and make or suggest any repairs as needed.

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・Fair and transparent pricing

Get a quote

What others are asking

Q: Car misfires; loud engine noise

If your vehicle is misfiring, and making lot's of noises, there is probably some sort of engine performance related problems. Symptoms like these can be caused by the need for a tune up, to a problem with one of the...

Q: Hi. I have a 1999 Lexus GS 300 and I wanted to know if you use OEM parts?

Hi there. The parts team at YourMechanic has gone through a rigorous filtering process to select the brands that are best suited for your car. Our parts catalog has a list of approved brands for each type of car and...

Q: Whirring sound when driving.

You may be correct that it is a bad wheel bearing. However a thorough diagnosis would be needed in order to properly check your noise out. Sometimes something as simple as a plastic bag got caught on the axle and...

Related articles

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...
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...
P2103 OBD-II Trouble Code: Throttle Actuator Control Motor Circuit High
P2103 means there is a fault with the throttle actuator control motor circuit, likely due to a defective electrical component or part.