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

asked by on September 14, 2016

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.

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?
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

Thumping sound in reverse

Since you are not driving the car much then you may have the rear brake shoes grabbing when you back up. You should have the vehicle checked to make sure the rear brake shoes are in good shape and adjusted...

My steering wheel locked up or got stiff and the battery light came on and oil light came on but battery is fine and oil is there

Depending on whether your truck came with electric power steering or hydraulic power steering, this could have been caused by failing power steering whether it be hydraulic or electric. To provide steering assistance in an electronic power steering system, an...

Is it possible to fix a clogged catalytic converter without replacing it?

Hi there. In general, there is not an effective way to clean a clogged catalytic converter. There are several aftermarket products that claim to do so, but they typically cause more issues with fuel system components that I would never...

Related articles

How Long Does a Timing Cover Last?
A A timing cover protects parts such as the timing belt, timing chain, and gears inside of your vehicle. They are made from either plastic, metal, or a combination of synthetic materials. In modern vehicles, the covers are designed to...
The Best Used Cars to Buy If You're a Dog Breeder or Trainer
These These days, dogs are more and more likely to travel with people than ever before. After all, what dog doesn’t ride in a car? As a breeder and trainer though, you’re probably more likely to carry along dogs than...
A Buyer’s Guide to the 2012 Ford Escape
CUVs CUVs (Crossover utility vehicles) are becoming more and more popular these days, as consumers are interested in saving money and buying more eco-friendly vehicles but they still have a lot of people and cargo to move around. CUVs like...