Skip the auto shop - Our mechanics make house calls

Q: Diesel in the gas tank

asked by on

Diesel was accidentally put into the gas tank. The vehicle was then driven approximately eight miles.

A: Hello, the only repair that can be made is ...

Hello, the only repair that can be made is to drain the fuel tank, flush the fuel lines, flush the fuel rail, and replace the fuel filter. The fuel tank once drained, can be removed and then the fuel pump sender and pump unit can be removed and drained. The fuel tank can be washed out with a small amount of gas, drained, then put together and re-installed. While the tank is out the fuel lines should be flushed and the fuel filter replaced. The fuel rail and fuel injectors should be removed and the fuel rail flushed. The injector should have a new O-ring installed before being put into the fuel rail. Fresh gas can then be put in the tank and the car will run as normal. For the old fuel drained from the tank, the gas diesel mix is considered hazardous waste that should be handled appropriately by a professional.

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: The truck cannot be started, u1000 code

The code is for lost communication with the ECM's data lines. Try to loosen and retighten the ECM connector ground and the battery negative cable ground to the body. Clean and check both these connections and clear codes and see...

Q: Heating - A\c systems malfunction

The 1999 model year of the Intrepid has control system diagnostics for the manual HVAC system. Diagnostic codes that may be relevant to the problems you are describing may have been recorded and, if so, they are reported via the...

Q: Choosing a new car... Lexus GX 460 or Mercedes GL (gas or diesel)

I personally prefer diesel over gas because they generally last longer. I would also go with Mercedes over Lexus but that is just my personal opinion. I have worked on both types of vehicles and would rather work on a...

Related articles

How Long Does a Distributor O Ring Last?
The distributor is part of the ignition system in your vehicle and its purpose is to route high voltage from the ignition coil to the spark plug. The spark plug then...
P2428 OBD-II Trouble Code: Exhaust Gas Temperature Too High Bank 1
P2428 code definition A P2428 trouble code signifies that the PCM has detected a problem in the exhaust gas temperature sensor circuit in bank 1, which subsequently contains the number one...
How Much Does a Mechanic Make in Vermont?
Automotive technician jobs in Vermont have an average mechanic salary of $37k, with some mechanics earning a salary of $53k.