Q: I have a cylinder 3 misfire that only seems to happen when my gas tank gets low, is this likely due to a bad fuel injector/filter?

asked by on

The hesitation and idling associated with a cylinder misfire seems to clear up once I re-fill the tank and run something like Royal Purple or Sea Foam through it. This has only been an issue for this vehicle in the last two weeks or so, and this morning was the first time the SES light came on and I subsequently had the code checked. Thanks.

My car has 175000 miles.
My car has an automatic transmission.

The misfire can be caused by a worn spark plug, defective coil, faulty spark plug wire, faulty injector, plugged injector (each injector has its own miniature internal filter), mechanical valve fault and so forth. The most common issue is the spark plug is simply worn out or defective. If you have "long life" (100,000 miles) plugs, and they have even 75,000 miles on them, you’ll first want to consider changing the spark plugs. To get the root cause of the misfire pinpointed, and thence resolved, the recommended service is a misfiring diagnostic. If you request that service, a certified Mechanic, dispatched by YourMechanic right to your location, will get this diagnosed and resolved for you. If you have further questions or concerns, do not hesitate to re-contact YourMechanic.

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. I have a cylinder 3 misfire that only seems to happen when my gas tank gets low, is this likely due to a bad fuel injector/filter?

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: Heat won't turn on with car running.

Hi there. With the Fusion vehicles, I recommend turning the defroster on high before you shut off the car to the day before. This way when you turn your car on by remote start, the defroster system will be working...

Q: Sporadic chirp--dont think it's the belt

The chirping you are hearing may not be belt related. Your suspension can also make noises like this. If you hear the noises going over bumps that is a huge sign. The fact you have narrowed it down to one...

Q: Cylinder 4 misfire - 2004 Ford F-250

Hi there - yes, these plugs, and their cylinder heads, have proved to be a bit tricky. First tip is to replace the plugs with the engine warm. Second tip is to use one of the "deep sockets" specially made...

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...
How to Avoid Back Pain in a Car
If you have back problems, sitting in a car for an extended period of time can be excruciating. Even without back problems, you could experience discomfort and soreness from...