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
  • 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: Lights burn out every time I start the car

The starter requires a lot of battery power to turn over your engine, and if the ground for the starter, battery, body or engine is loose, then the starter will use another ground if it finds one. You may be...

Q: Hooked the car to a computer a tune up and the o2 sensor came up.

Based on the information you gave, these may be different issues. The loss of power and jerking are indicators that you probably have a misfire. I would suggest replacing your distributor cap, distributor rotor, spark plug wires and spark plugs...

Q: How do you use the parking brake?

Your car is equipped with a parking brake that should be used in almost all parking situations, even if you’re parking on what seems to be a flat, level surface. In addition, you’ll need to make sure you’re applying it...

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...
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...
P2103 OBD-II Trouble Code: Throttle Actuator Control Motor Circuit High
P2103 means there is a fault with the throttle actuator control motor circuit, likely due to a defective electrical component or part.