Skip the auto shop - Our mechanics make house calls

Q: My car is losing power, and I can't figure out what is wrong - 2006 Ford Fusion

asked by on

Car started missing and losing power. Got it home have changed spark plugs egr valve pcv valve checked convertor done compression test and still now change. Car sounds horrible and runs horrible. Have also checked coils and for vacuum leaks

Hopefully, there are diagnostic trouble codes stored. If not, a scope (for instance, an oscilloscope) diagnostic is needed to see exactly what is going on within each cylinder. With a scope you can determine if you have a random lean misfire, which points to an air leak or fuel supply issue, or you could have an issue related to just one or a couple cylinders.

Without such a diagnostic, you could check out the more common faults on that engine including a defective Delta Pressure Feedback EGR (DPFE) sensor, problems with the Variable Valve Timing solenoid, a dirty mass airflow sensor, vacuum leaks in the intake manifold or vacuum connections.

Regarding vacuum leaks, a smoke machine is often required to find vacuum leaks in the intake plumbing. Another possibility is problems in the fuel delivery system such as a restriction in the fuel pump (there is no serviceable fuel "filter" on your model) or inadequate fuel pump pressure and regulation. A scope would help rule out or confirm such issues.

I recommend having a certified mechanic, such as one from YourMechanic, perform an inspection to determine why your car is losing power and suggest any necessary repairs.

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!
  • Home
  • Questions
  • My car is losing power, and I can't figure out what is wrong - 2006 Ford Fusion

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: Hose hanging underneath car

There are a variety of things that could resemble a hose hanging from the bottom of your car. Without additional information related to the steering symptoms it would be tough to say specifically. Some things to consider are: Does the...

Q: Experiencing a slight rattle and loss of power.

Is this an automatic or manual transmission? I need to know what type of transmission you have because this rattling sound could be different things depending if it is an auto trans or manual. Either way I would recommend that...

Q: Is a coolant leak a byproduct of redlining a car for an extended amount of time?

Wow! You'd better check the oil too! Driving the car this way is about the same as taking it out on the racetrack for about an hour. The racetrack always brings out any weakness that a car has so If...

Related articles

How Do Power Car Windows Increase Passenger Safety?
Power windows are responsible for approximately 2,000 emergency room visits every year. When a power window closes, it exerts enough force to bruise or break bones, crush fingers, or restrict an airway. Though...
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...
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...