Q: Expedition misfires going down road at about 40mph. It will eventually "punch" through and take off smoothly at faster speed. Che

asked by on

Expedition misfires. Check engine light on.

My car has 165000 miles.
My car has an automatic transmission.

Hello, thank you for writing in. The first step is to have the vehicle scanned for diagnostic codes. Then you can take that information and find out what is causing the misfire. Without that information it is a guessing game. The most common reasons for a misfire are spark, air, and fuel. There are several sensors that can also cause these symptoms. Think about any recent work you have had done. Consider the last time you had the spark plugs changed and examined. The fuel injectors can also become gunked up and need to be cleaned. The issue may be general maintenance related, or it may be something more intensive. More testing will need to be done. For further help resolving the issue, contact our service department to schedule an appointment.

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. Expedition misfires going down road at about 40mph. It will eventually "punch" through and take off smoothly at faster speed. Che

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: Misfire, loss of power, CEL comes on... Replacing ignition coils did not fix

Hello. The numbers you have provided did not yield any results through my search. If the part numbers are different, and the ends are physically different, then they may very well be different coils or it may just be an...

Q: What does it mean if the Seat Belt Light comes on in the dash?

The only lifesaving devices your car includes are your seat belts. Even the air bags aren’t considered “lifesaving” by the US government. If the Seat Belt Light in the dash is on, it could indicate a couple of different things:...

Q: master cylinder is bad, but does it make a noise going down the road. if so what kind. mine is intermittent

Hello, thank you for writing in. The master cylinder may make some noises, however it is rather unlikely that you are going to hear these fluid sounding noises over the engine noise. Start by adding the differential fluid and take...

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...
P0240 OBD-II Trouble Code: Turbocharger Boost Sensor B Circuit Range/Performance
P0240 code definition Turbocharger Boost Sensor B Circuit Range/Performance What the P0240 code means P0240 is an OBD-II generic code triggered when the Engine Control Module (ECM) detects the intake boost...
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...