Q: My car is making a knocking noise and there's a fuel leak

asked by on

When my car turns on it acts normal then 5 mins later fuel is leaking a knocking noise starts the car will not go forward but when i backup it goes very slow

My car has 25000 miles.
My car has an automatic transmission.

You need to have the fuel leak fixed ASAP. A fuel leak can cause a fire and at the very least it will reduce your fuel mileage. Fuel leaks are no different that a leaky water pipe in how they leak. Difference fluid and more pressure, but leaks are leaks. You first need to locate the leak before you can know what needs to be replaced. I recommend having a fuel is leaking from the gas tank inspection. Include a note to the mechanic, if you choose one from YourMechanic, when you book this appointment letting him know you are not sure where the leak is coming from.

The knocking noise is another issue. There are dozens of things on a car that can cause a knocking noise. Although, with the given description, I could say that maybe there is a drive line problem. This would be an axle, drive shaft, or transmission issue. Locating where the knock is coming from should reveal what the issue is. If the noise begins when you put the car in gear and attempt to go forward, one of these is most likely the cause. I recommend having a car is making a noise inspection.

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. My car is making a knocking noise and there's a fuel leak

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: Check engine light on, engine knocking, loss of power, and coolant leaking.

Hi there. Grab a flashlight and look under the vehicle for where the coolant leak is coming from. Either there is a gasket, hose, or freeze plug that is leaking causing the coolant to leak or the engine has cracked....

Q: Won't go in drive

You will need to have the shift linkage checked where the shift cable connects to steering column. The bracket screws come loose and inhibit proper shifting.

Q: My car knocks - 2006 Toyota Yaris

Hello. In newer vehicles with electronic fuel injection and ignition systems, engine knocking due to bad fuel or spark is extremely rare. In most cases, if the knocking sound is consistent and increases in speed as the RPM increases, it's...

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...
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...
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...