Q: Gas contaminated with water, how much to fix, what needs to be done?

asked by on July 16, 2017

Daughter took car to dealer, engine light on. Mechanic states gas tainted with water. What would be needed to be done and how much should it cost. They were trying to add on spark plugs for $ 700, this would bring total job over $2500. Hat are her options?

My car has 54000 miles.
My car has an automatic transmission.

The best way to remove all water from the gas tank is to simply replace the entire volume of gas that is being used. "HEET" is a fuel additive that is made for removing water from the gas tank. However, if there is more water in the tank than there is gas, fuel additives will not work. The best way to remove gas from the tank is a process of immediate displacement, siphoning out the old gas while immediately placing high octane gas in the tank as quickly as possible. Depending on the amount of water in the tank, you may want to drain the gas tank and leave it empty for a while allowing it to dry out. I would suggest having a professional mechanic come to your location to diagnose and inspect your vehicle.

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


Experienced Mechanic?

Earn up to $70/hr

What others are asking

Key coming right out of ignition
If your key comes out of the ignition switch while the engine is on or in the on position, the ignition switch could be faulty and may require replacement. If not repaired, this issue could start to cause other electrical...
Car shakes and starts to die while idling
The battery dying is it’s own issue. It could be the battery itself, the charging system, or an electrical drain when the key is off. All of these will need tested to find the culprit. The engine running poorly and...
Loud rattling from power steering pump
From the symptoms you describe on your Kia and the leaking you are observing, it sounds like the power steering pump is failing internally. This is due to running low on power steering fluid. The power steering pump plays...
There is whirring noise and vibration coming from the front end of my car
Hello. It sounds like you have a bad front hub bearing. When the bearing fails, this will occur as the noise you are hearing is the bearings not having any grease on them. I typically start by getting the vehicle...
Transmission light illuminated
Hello. Thanks for writing in about your 2008 BMW 750i. If the transmission light is on, there's a 98% guarantee that the transmission has developed a flaw. I suggest that you attempt to have the trouble code retrieved by a...
Accelerator doesn't respond
Hi there, Your car's throttle control system is comprised of a few different components that all work together to control the throttle as you press on the gas pedal. The foot pedal position sensor (https://www.yourmechanic.com/services/throttle-position-sensor-replacement) relays the position of your...
How many spark plugs and does it have a coil pack
Hi There, Your vehicle should have 6 spark plugs (https://www.yourmechanic.com/services/spark-plugs-replacement); one for each cylinder. You should also have 6 coil packs (https://www.yourmechanic.com/services/ignition-coil-replacement); again one for each cylinder. Should you need further assistance with changing these, I would recommend having a...
What services do I need? 1994 Ford Explorer
Hi - since the repair history, and the on-going brake problem symptoms (https://www.yourmechanic.com/question/my-brake-pedal-s-soft-and-the-car-s-braking-system-is-in-good-shape-so-what-can-it-be-by-mike-m) seem a bit murky, I would recommend a brake system inspection (https://www.yourmechanic.com/services/brake-safety-inspection) by a mobile, professional mechanic, such as one from YourMechanic, who will come to your...
My car is a 2007 Subaru Forester: it is shaking when stopped & driving, check engine on, and sometimes little acceleration
Inasmuch as the check engine light is on, trouble codes will have been stored. Those stored troubles codes, which the mechanic can download, will give a good general indication of where the problem lies but a more specific diagnostic must...

Related articles

Top 10 Factors to Consider When Buying a Luxury Car
The The idea of owning a luxury car is appealing. The glossy paint, swoopy lines, and prestigious badges speak of the owner’s success in life, while the interior opulence offers scented leather surfaces, high-tech telematic devices, and all the creature-comfort...
The 5 Safest Used Cars You Can Buy For Under $20,000
The Subaru Legacy, Honda Accord, Ford Fusion, Chevy Volt, and the Volvo XC60 are five of the overall safest used cars you can buy for under $20,000.
Understanding the Lexus Oil Life Monitor Service Indicator Lights
Car symbols, or dashboard lights, are a car service reminder. The Lexus Oil Life Monitor (OLM) indicates when and what service your car needs.