[rhonamitra]

For a while now, about 10k miles, I've had intermittent barking of the turbo on deceleration and every once in a great while on acceleration. The other day, after a 2 hour jaunt, while listening to a weak AM radio station I heard the whine/spinning of the turbo on the radio. It only lasted as long as the station was weak, but it was definitely the turbo.
Is the turbo headed for failure?

04 6.0 Lariat AT with 3:73's

 

[chadjones99]

most likly not. these turbos bark mine does it if its under a heavy load and i leet off of the pedel to fast. its the back presure trying to run back the other way.
and as for your radio ? try putting a noise filter inline on the power wire going to it.

 

[cb1000]

the bark or FART (as some refer to it) is the EBPV (exhaust
back pressure valve) its the equiv. of a waste-gate for our
trucks.

its a pressure relief valve of sorts.

the EBPV is an electronically controled solenoid...and they
can fail (like anything else mechanical)...if its failing to
operate as programed it likely will generate "codes".

 

[GregH]

[ QUOTE ]

the bark or FART (as some refer to it) is the EBPV (exhaust
back pressure valve) its the equiv. of a waste-gate for our
trucks.

[/ QUOTE ]

Ummm, there is no valve on this truck with this name.

[ QUOTE ]

its a pressure relief valve of sorts.

the EBPV is an electronically controled solenoid...and they
can fail (like anything else mechanical)...if its failing to
operate as programed it likely will generate "codes".

[/ QUOTE ]

The only electrically controlled solenoid that is exposed to exhaust flow is the EGR valve. The only sensor exposed to exhaust is the EBP sensor. The VGT solenoid isn't directly exposed to exhaust, but it may be what this poster is refering to. The VGT solenoid rotates the unison ring in the exhaust side of the turbo to direct exhaust flow to the turbocharger turbine wheel. Typically, if there is a failure in this system, then the vane system will stick from deposits or rust on the exhaust side of the turbo. Then you'll get an over or under boost condition and possibly some codes.

Some amount of turbo "farting" is considered normal. If it is excessive, then usually some sensor or actuator will be performing outside of it's design parameters (specifically, the EBP sensor, EGR valve, or the variable turbocharger). If something is outside of it's design limits, then an appropriatly skilled technician can find it and fix it.

 

[cb1000]

agreed its not a VALVE...rather a SENSOR
http://dan.prxy.org/Truck/6L_bible_html/html/Page_058.html

as you say a valve solenoid or SENSOR does NOT have to
be EXPOSED to (OR IN) the exhaust flow to impact the FLOW.

 

[ford_doctor]

[ QUOTE ]
The other day, after a 2 hour jaunt, while listening to a weak AM radio station I heard the whine/spinning of the turbo on the radio. It only lasted as long as the station was weak, but it was definitely the turbo.

[/ QUOTE ]


Any link between the turbocharger and your radio interference would be bizarre. You are likely hearing RF emissions from either the IDM itself or the injector harness affecting your radio reception. The fuel injector harness is shielded to prevent such interference however if your radio's signal is weak enough, some stray interference may be detectable. The frequency should be high and will vary with engine RPM therefore your link to the turbo is understandable.

 

[diesel_doctor]

Alternator maybe, that I'd believe and would rev up and down when you mash the throttle.

 

[chadjones99]

the 03 have a butterfly valve at the intake after 03 they took this valve away. when you let off of the pedal it will close and if there is a lot of boost at the time it will push back through the turbo. i have seen this valve whe i had my intake elbow off
i beleave the 03 is the only year with this.

 

[ford_doctor]

[ QUOTE ]
Alternator maybe, that I'd believe and would rev up and down when you mash the throttle.

[/ QUOTE ]

Another good thought!