Skip the auto shop - Our mechanics make house calls

Q: Gas smell while driving.

asked by on

Every time I drive my car it smells like gas. I replaced five spark plugs and one of the spark plugs was covered in oil.

A: Smelling a gas odor coming from your vehicl...

Smelling a gas odor coming from your vehicle is never good experience and it usually means there is a leak somewhere. From the description provided, it is quite possible that the EVAP Purge Canister has developed a leak and needs to be replaced on your vehicle. This canister captures gas fumes from entering the atmosphere and occasionally will need to replaced.

Other common situations I have seen concerning the vehicle and gas smells are when o-rings and seals, found on the fuel rail, go bad. They will develop a small but big enough leak to emit a gas odor, though your car may not actually be leaking gas. Another situation that comes to mind concerning the gas smell is when the back spark plugs were not torqued correctly after being replaced and then come loose, allowing once again a gas odor to escape the combustion chamber.

It was mentioned that five of your Expedition’s spark plugs were replaced and one was covered in oil. Spark plugs need to all be replaced at the same time in order for the engine to run efficiently and it is recommended this always be done. The spark plugs need to be torqued down to factory specifications as well so it is important that this is verified. In regards to the plug with oil on it, I would assume the vehicle may have developed a leak in the spark plug tube which allows oil to enter the orifice. With concerns like these, I would highly recommend enlisting the help of a certified mechanic as soon as possible to inspect your problems and avoid issues advancing in the future.

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

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: I've filled my washer fluid up but the light saying it's low is still on

The low fluid sensor is mounted inside the washer tank. The sensor may have been contaminated with different typed of cleaning fluids or contacts blocked with debris. I would recommend cleaning out washer tank and sensor to see if this...

Q: Reverse not working

If you are able to put the transmission in reverse, but it just wont go and acts like its in park/neutral, you could be having internal transmission issues. There are many components inside an automatic transmission but things like a...

Q: I want to eliminate the ac compressor what do I do and how to do it

Depending on the vehicle you have, you may be able to get an A/C eliminator kit from an auto parts store or online. This kit is designed to allow you to eliminate the A/C and sometimes use the same belt....

Related articles

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...
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...
What are the Car Pool Rules in Hawaii?
Hawaii is widely regarded as a land of vacation and relaxation, and as such, its scenic roads and routes are far better known than the state’s freeways. But, as with all...