Skip the auto shop - Our mechanics make house calls

Q: Cam phaser symptoms? 2006 Ford F-150

asked by on

What are symptoms of failed cam phasers?

My car has 155000 miles.
My car has an automatic transmission.

Noise and/or failure of the variable cam timing phasers is a well known issue on the 5.4L V-8. In 2006, Ford issued a technical service bulletin, denoted TSB 06-19-8, to explain the service and repair procedures to deal with the noise.

Typically, worn phasers create a loud and rough idle. Often, a knocking noise is heard. In some instances, the noise is not due to wear in the phasers but rather low oil pressure due to cam bearing wear in the cylinder heads. If that is the case, the heads may need to be replaced or machined.

See the TSB for specific instructions but additional reported fixes have included installing a high volume oil pump. That has has the effect of increasing oil flow to the cam phasers. Some owners have also tried locking the phasers at base timing via installation of plugs that prevent the vanes from moving but this is not recommended as it defeats the VVT capability and the PCM would have to be custom re-programmed.

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: New motor, ran good one week but now will not start. Changed multiple sensors. It will try and start with the throttle body wide open

Hi there. The first thing you could do is check all fuses. On some vehicles, for example, the fuse to the power door lock provides power to a module that initiates a "start" signal to the PCM. Although you do...

Q: every week or so my car will crank and when I put it into drive or reverse it will shut off and crank right back t

There is a technical bulletin out for your 1999 Tahoe put out by Chevrolet. It's number 00-07-30-006, 87-71-63, calling for the reprogramming of the transmission/engine program. You will need to have the dealer reprogram the vehicle for you. Before you...

Q: P0022

Hi there. The Lucas oil stabilizer should not have caused any issues. The P0019, P0022, P0300, P0305, P0307, and P0308 codes are all related to bank(2). The camshaft position out of sync has, more than likely, led to the misfire...

Related articles

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...
Rules of the Road For Iowa Drivers
Driving on the roads requires knowledge of the rules, many of which are based on common sense and courtesy. However, even though you know the rules in...
How to Avoid Back Pain in a Car
If you have back problems, sitting in a car for an extended period of time can be excruciating. Even without back problems, you could experience discomfort and soreness from...