New to the game and have a question

[Lurch_F350]

Hello All,

First let me apologize as I am sure this question has been asked several times over already.

I just became the proud new owner of a 2000 F350 4x4 w/ 7.3 psd. Now for the question. When I am driving at a constant speed (doesn't matter what gear I'm in) I'm getting something that sounds like a really bad air leak. As soon as I either lift off and coast or get into it a bit it disappears. It has also done this a couple of times while idleing, when it did it at idle it also revved up to about 1300 rpm. A tap on the throttle and it settled down. Should also mention in the 2 weeks I have had the truck it seems (I think anyway) to be getting worse.

Any help will be greatly appreciated.

Lurch

 

[Rex-a-FORD]

Sounds like the Exhaust Backpressure Valve (EBV).

Does it happen when the engine is still pretty cold. Shouldn't happen after it get's warmed up and running down the road.

The high idle is part of the cold weather strategy. The engine will idle up to build more heat and prevent wetstacking.

 

[powerboatr]

first
welcome aboard
second, do you have the factory exhaust still intact on the truck
third like was mentioned how cold is where you are driving? the ebv should not be functioning at steady state rpms above dont quote me 1600 RPM
while driving. however if its like super "crumm" cold and your running light throttle pressure it could be actuating going down the road.
but i would check my muffler first, these puppies have a very restrictive factory muffler and it gets very worse at higher mileages
and the down pipe clamp,

 

[Lurch_F350]

Thanks for the thoughts. I live up here in Canada, more specifaly on the south coast of BC. The temperature has been somewhere in the high 50's to mid 60's F. At idle it has only done it while the engine is relatively cold. But while driving it does it even when the engine is right up to temp.

Yes the factory exhaust is still intact. There are no mods whatsoever. It has just over 100 000 miles on it.

Thanks.

 

[Rex-a-FORD]

Could be that your EBV sensor is plugged. I've heard of that happening. It's located in the right exhaust manifold towards the front of the engine. I guess you can take it off and clean and see what happens. Maybe someone else can jump in that's had some experience with it.

Here's a little explanation on the EBV:

EBP (Exhaust Back Pressure) OPERATION (If Vehicle is Equipped With) PCM controlled based on following parameters:

IAT Intake Air Temperature) Below 10°C (50°F) to activate EBP

EOT (Engine Oil Temperature) Below 70°C (158°F) to activate EBP

A high pitched whine, in exhaust system, will be heard when EBP device is active.

At the turbo exhaust outlet is a butterfly that when actuated will restrict the exhaust flow, this causes the engine to work harder in cold ambients and generate engine coolant temperature quicker for cab heat. The actuation of this device is controlled by the PCM and the EBP regulator located in the turbo pedestal. The EBP regulator restricts lube oil flow out of the turbo (center housing) and directs oil to the turbo pedestal which pushes the EBP actuator arm outward causing the butterfly to close or restrict exhaust flow. The PCM uses the EBP sensor to monitor the exhaust restriction. The EBP sensor is connected to the right exhaust manifold using a pipe and fitting. The exhaust back pressure device will open when the accelerator pedal is depressed and the exhaust back pressure increases. When the exhaust back pressure decreases or the vehicle is in a steady state, exhaust back pressure decreases per the EBP sensor, the EBP regulator can and will activate the EBP device again even while going down the highway as long as the EOT temperature is below the specifications.

 

[whatabudro]

Hey REX can I quote your wording on the EBPV in my EBPV WIKI article? With some writing credits ofcourse.

 

[Rex-a-FORD]

Hey REX can I quote your wording on the EBPV in my EBPV WIKI article? With some writing credits ofcourse.

No need to quote me............I copied it off another website........

Hope I'm not in trouble again.......

 

[Lurch_F350]

Thanx Rex.

I'll give cleaning that sensor a whack and see if it helps.