Skip the auto shop - Our mechanics make house calls

Q: Experiencing rough idle and misfire on multiple cylinders on bank 2

asked by on

I have a 2004 Ford F150 and recently it has started with a rough idle and loss of power. I have a programmer so I can read all of my codes. I have about 12 codes. It started out with a camshaft position sensor issue on bank 2, and that was it. Now it has progressed to camshaft position sensor issues on both banks, camshaft position actuator issues on both banks, misfires on cylinders 5, 7, and 8, misfire on startup, random misfire detected, and a couple of other codes that has to do with the misfires. I have brand new spark plugs and brand new coil packs so I know that is not it. Both of the VCT solenoids are brand new, camshaft position sensors are brand new, and wiring on the sensors is brand new. I have tried everything that I know of to try, and now I'm lost.

My car has 280000 miles.
My car has an automatic transmission.

A: Hello, thanks for reaching out to us about ...

Hello, thanks for reaching out to us about your Ford’s rough iding and misfiring. Typically, when your vehicle is running with these codes and symptoms, it’s due to faulty camshaft phasers that need replacing, or the timing chain is worn out.

Defective camshaft phasers are a common problem and will cause the variable valve timing to be off just enough to cause rough idling or misfiring. I would fix the camshaft phasers first, and if symptoms still occur, I’d recommend replacing the timing chain (you will need to remove the timing cover to do so).

If you’d like help with either of these tasks, consider YourMechanic and a certified mechanic can come to your home or office to diagnose and repair these issues for you.

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

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: what is the location of the camshaft position sensor

If you are standing in front of the car, it is on the right side of the engine near the top. It is below the valve cover and bolts into the head with one bolt. If you need help having...

Q: Hi I have a 2004 Santa Fe and I've had to replace the alternator on it and now it's the second time in three months we found out t

Without seeing for myself, I'd say it is more than likely fixable. Oil leaks are not uncommon as vehicles age. It can simply be a valve cover gasket - the top engine cover gasket. Only if it turns out to...

Q: Ran the car with no oil and won't turn on

Hi, thanks for writing in. If you have ran your engine with no oil in it, it is almost a certainty that it will need to be replaced. If it is not starting now due to the no oil issue...

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 P0052 code means This code is seen when the Engine Control Module (ECM) tries to control the...
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.